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OMMP regulations on number of plants and amount of meds you are allowed.



Does your leaves tell a story?

Look closely, and you'll see the brown leaf edges that are indicative of heat stress. This damage looks alot like nutrient burn, except it occurs only at the tops of the plants closest to the lamps. There's only one cure for this...get the heat away from the plants, either by moving the lamps or moving the plants.

There's a good chance that this bud was subjected to nutrient solution burn. These symptoms are seen when the EC concentration of hydroponic solutions is too high. These symptoms also appear when strong nutrient solution is splashed onto the leaves under hot HID lamps, causing the leaves to burn under the solution.

Many hydroponic gardeners see this problem. It's the beginning of nutriet burn. It indicates that the plants have all the nutrients they can possibly use, and there's a slight excess. Back off the concentration of the nutrient solution just a touch, and the problem should disappear. Note that if the plants never get any worse than this here, then the plants are probably just fine.

Figure A. is definitely an over-fert problem. The high level of nutrients accumulates in the leaves and causes them to dry out and burn up as shown here. You must flush with clear, clean water immediately to allow the roots to recover, and prevent further damage. Then find the cause of the high nutrient levels.

Figure A.

Both of these leaves in figure B and figure C are from the same plant. It could be over fertilization, but more likely it is due to the pH being off. Too high or too low a pH can lock up nutrients in the form of undisolvable salts and compounds, some of which are actually toxic to the plants.
What then happens is the grower then tries to supplement the plants diet by adding more fertilizers, throwing off the pH even more and locking up even more nutrients. This type of problem is seen more often in soil mixes, where inconsistent mixing of the medium's components leads to "hot" spots.

Figure B

Figure C



Root stunting - is characteristic of calcium deficiency, acidity, aluminum toxicity, and copper toxicity. Some species may also show it when boron deficient. The shortened roots become thickened, the laterals become stubby, peg-like, and the whole system often discolours, brown or grey. New shoots unopened; young leaves distorted; dead leaf tips; pale green plant copper deficiency New shoots withered or dead; petiole or stem collapse; shoots stunted; green plant calcium deficiency Young leaves pale green or yellow; rosetting or dead tip; dieback; dark green plant boron deficiency Mobile elements are more likely to exhibit visual deficiencies in the older leaves, because during demand these elements will be exported to the new growth.

Nitrate - Ammonium is found in both inorganic and organic forms in the plant, and combines with carbon, hydrogen, oxygen and sometimes sulfur to form amino acids, amino enzymes, nucleic acids, chlorophyll, alkaloids, and purine bases. Nitrogen rates high as molecular weight proteins in plant tissue. Plants need lots of N during vegging, but it's easy to overdo it. Added too much? Flush the soil with plain water. Soluble nitrogen (especially nitrate) is the form that's the most quickly available to the roots, while insoluble N (like urea) first needs to be broken down by microbes in the soil before the roots can absorb it. Avoid excessive ammonium nitrogen, which can interfere with other nutrients. Too much N delays flowering. Plants should be allowed to become N-deficient late in flowering for best flavor.

Nitrogen Deficiencies Plants will exhibit lack of vigor, slow growth and will be weak and stunted. Quality and yield will be significantly reduced. Older leaves become yellow (chlorotic) from lack of chlorophyll. Deficient plants will exhibit uniform light green to yellow on older leaves, these leaves may die and drop. Leaf margins will not curled up noticeably. Chlorosis will eventually spread throughout the plant. Stems, petioles and lower leaf surfaces may turn purple.

As seen in figure D consumption of nitrogen (N) from the fan leaves during the final phase of flowing is 100% normal.

Figure D

Leaves are often dark green and in the early stages abundant with foliage. If excess is severe, leaves will dry and begin to fall off. Root system will remain under developed or deteriorate after time. Fruit and flower set will be inhibited or deformed. With breakdown of vascular tissue restricting water uptake. Stress resistance is drastically diminished.

Phosphorus is a component of certain enzymes and proteins, adenosine triphosphate (ATP), ribonucleic acids (RNA), deoxyribonucleic acids (DNA) and phytin. ATP is involved in various energy transfer reactions, and RNA and DNA are components of genetic information. This is severe phosphorus (P) deficiency during flowering. Fan leaves are dark green or red/purple, and may turn yellow. Leaves may curl under, go brown and die. Small-formed buds are another main symptom.

Phosphorus deficiencies exhibit slow growing, weak and stunted plants with dark green or purple pigmentation in older leaves and stems.

Some deficiency during flowering is normal, but too much shouldn't be tolerated. Red petioles and stems are a normal, genetic characteristic for many varieties, plus it can also be a co-symptom of N, K, and Mg-deficiencies, so red stems are not a foolproof sign of P-deficiency. Too much P can lead to iron deficiency. Purpling: accumulation of anthocyanin pigments; causes an overall dark green color with a purple, red, or blue tint, and is the common sign of phosphate deficiency. Some plant species and varieties respond to phosphate deficiency by yellowing instead of purpling. Purpling is natural to some healthy ornamentals.

Picture below shows Phosphorus (P) deficiency during vegatative growth. Many people mistaken this for a fungus, but look for the damage to occur near the end of leave, and leaves the color dull greyish with a very brittle texture

This condition is rare and usually buffered by pH limitations. Excess phosphorus can interfere with the availability and stability of copper and zinc.

Potassium is involved in maintaining the water status of the plant and the tugor pressure of it's cells and the opening and closing of the stomata. Potassium is required in the accumulation and translocation of carbohydrates. Lack of potassium will reduce yield and quality. Older leaves are initially chlorotic but soon develop dark necrotic lesions (dead tissue). First apparent on the tips and margins of the leaves. Stem and branches may become weak and easily broken, the plant may also stretch. The plant will become susceptible to disease and toxicity. In addition to appearing to look like iron deficiency, the tips of the leaves curl and the edges burn and die.

Potassium - Too much sodium (Na) displaces K, causing a K deficiency. Sources of high salinity are: baking soda (sodium bicarbonate "pH-up"), too much manure, and the use of water-softening filters (which should not be used). If the problem is Na, flush the soil. K can get locked up from too much Ca or ammonium nitrogen, and possibly cold weather.

Usually not absorbed excessively by plants. Excess potassium can aggravate the uptake of magnesium, manganese, zinc and iron and effect the availability of calcium.

Magnesium is a component of the chlorophyll molecule and serves as a cofactor in most enzymes.


Magnesium deficiency will exhibit a yellowing (which may turn brown) and interveinal chlorosis beginning in the older leaves. The older leaves will be the first to develop interveinal chlorosis. Starting at leaf margin or tip and progressing inward between the veins. Notice how the veins remain somewhat green though as can be seen in this picture. Notice how in these 2 pictures, the leaves curl upwards like they're praying? They're praying for Mg! The tips may also twist.

This can be quickly resolved by watering with 1 tablespoon Epsom salts/gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil. If the starting water is above 200 ppm, that is pretty hard water, that will lock out mg with all of the calcium in the water. Either add a 1/4 teaspoon per gallon of epsom salts or lime (both will effectively reduce the lockout or invest into a reverse osmosis water filter. Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients.


Magnesium toxicity is rare and not generally exhibited visibly. Extreme high levels will antagonize other ions in the nutrient solution.

Zinc plays a roll in the same enzyme functions as manganese and magnesium. More than eighty enzymes contain tightly bound zinc essential for their function. Zinc participates in chlorophyll formation and helps prevent chlorophyll destruction. Carbonic anhydrate has been found to be specifically activated by zinc. Deficiencies appear as chlorosis in the inter-veinal areas of new leaves producing a banding appearance as seen in this picture. This may be accompany reduction of leaf size and a shortening between internodes. Leaf margins are often distorted or wrinkled. Branch terminals of fruit will die back in severe cases. Also gets locked out due to high pH. Zn, Fe, and Mn deficiencies often occur together, and are usually from a high pH. Don't overdo the micro-nutrients- lower the pH if that's the problem so the nutrients become available. Foliar feed if the plant looks real bad. Use chelated zinc. Zinc deficiency produces "little leaf" in many species, especially woody ones; the younger leaves are distinctly smaller than normal. Zinc defeciency may also produce "rosetting"; the stem fails to elongate behind the growing tip, so that the terminal leaves become tightly bunched.

Excess Zinc is extremely toxic and will cause rapid death. Excess zinc interferes with iron causing chlorosis from iron deficiency. Excess will cause sensitive plants to become chlorotic.

Immobile elements will show their first symptoms on younger leaves and progress to the whole plant.

Sulfate is involved in protein synthesis and is part of the amino acids, cystine and thiamine, which are the building blocks of proteins. It is active in the structure and metabolism in the plant. It is essential for respiration and the synthesis and breakdown of fatty acids. The initial symptoms are the yellowing of the entire leaf including veins usually starting with the younger leaves. Leaf tips may yellow and curl downward. Sulfur deficiencies are light green fruit or younger leaves with a lack of succulence. Elongated roots and woody stem. Although it's hard to see here, the upper stems of this plant are purple. Although many varieties of cannabis do get purplish stems, the trait generally extends the entire length of the plant's stem, and not just near the top as in this specimen.

Leaf size will be reduced and overall growth will be stunted. Leaves yellowing or scorched at edges. Excess may cause early senescence.

Calcium plays an important role in maintaining cell integrity and membrane permeability.

Young leaves are affected first and become small and distorted or chlorotic with irregular margins, spotting or necrotic areas. Bud development is inhibited, blossom end rot and internal decay may also occur and root may be under developed or die back. Deficiency will cause root tip die-back, leaf tip curl and marginal necrosis and chlorosis primarily in younger leaves. Symptoms: young leaves develop chlorosis and distortion such as crinkling, dwarfing, developing a strap-like shape, shoots stop growing and thicken.

Difficult to distinguish visually. May precipitate with sulfur in solution and cause clouding or residue in tank. Excess calcium may produce deficiencies in magnesium and potassium.

Iron is an important component of plant enzyme systems for electron transport to carry electrons during photosynthesis and terminal respiration. It is a catalyst for chlorophyll production and is required for nitrate and sulfate reduction and assimilation.

Pronounced interveinal chlorosis similar to that caused by magnesium deficiency but on the younger leaves.

Leaves exhibit chlorosis (yellowing) of the leaves mainly between the veins, starting with the lower and middle leaves.

Caused by factors that interfere with iron absorption of roots: over irrigation, excessive soluble salts, inadequate drainage, pests, high substrate pH, or nematodes. This is easily corrected by adding an iron supplement with the next watering.

Fe is unavailable to plants when the pH of the water or soil is too high.

If deficient, lower the pH to about 6.5 (for rockwool, about 5.7), and check that you're not adding too much P, which can lock up Fe. Use iron that's chelated for maximum availability. Read your fertilizer's ingredients - chelated iron might read something like "iron EDTA". To much Fe without adding enough P can cause a P-deficiency. Note that when adding iron to the solution, it is often necessary to not use fertilizer for that watering. Iron has a tendency of reacting with many of the components of fertilizer solutions, and will cause nutrient lockup to occur. Read the labels of both the iron supplement and the fertilizer you are using before you attempt to combine the two.

Excess accumulation is rare but could cause bronzing or tiny brown spots on leaf surface.

Manganese is involved in the oxidation reduction process in the photosynthetic electron transport system. Biochemical research shows that this element plays a structural role in the chloroplast membrane system, and also activates numerous enzymes.

Interveinal chlorosis of younger leaves, necrotic lesions and leaf shredding are typical symptom of this deficiency. High levels can cause uneven distribution of chlorophyll resulting in blotchy appearance. Restricted growth and failure to mature normally can also result.

Mn gets locked out when the pH is too high, and when there's too much iron. Use chelated Mn.

Toxicity:Chlorosis, or blotchy leaf tissue due to insufficient chlorophyll synthesis. Growth rate will slow and vigor will decline.

Chloride is involved in the evolution of oxygen in the photosynthesis process and is essential for cell division in roots and leaves. Chlorine raises the cell osmotic pressure and affects stomata regulation and increases the hydration of plant tissue. Levels less than 140 ppm are safe for most plants. Chloride sensitive plants may experience tip or marginal leaf burn at concentrations above 20 ppm. Wilted chlorotic leaves become bronze in color. Roots become stunted and thickened near tips. Plants with chlorine deficiencies will be pale and suffer wilting.

Burning of leaf tip or margins. Bronzing, yellowing and leaf splitting. Reduced leaf size and lower growth rate. Boron biochemical functions are yet uncertain, but evidence suggests it is involved in the synthesis of one of the bases for nucleic acid (RNA uracil) formation. It may also be involved in some cellular activities such as division, differentiation, maturation and respiration. It is associated with pollen germination.

Plants deficient in boron exhibit brittle abnormal growth at shoot tips and one of the earliest symptoms is failure of root tips to elongate normally. Stem and root apical meristems often die. Root tips often become swollen and discolored. Internal tissues may rot and become host to fungal disease. Leaves show various symptoms which include drying, thickening, distorting, wilting, and chlorotic or necrotic spotting. Yellowing of leaf tip followed by necrosis of the leaves beginning at tips or margins and progressing inward before leaves die and prematurely fall off. Some plants are especially sensitive to boron accumulation.

Copper is a constituent of many enzymes and proteins. Assists in carbohydrate metabolism, nitrogen fixation and in the process of oxygen reduction. Symptoms of deficiency are a reduced or stunted growth with a distortion of the younger leaves and growth tip die-back. Young leaves often become dark green and twisted. They may die back or just exhibit necrotic spots. Growth and yield will be deficient as well.

Copper is required in very small amounts and readily becomes toxic in solution culture if not carefully controlled. Excess values will induce iron deficiency. Root growth will be suppressed followed by symptoms of iron chlorosis, stunting, reduced branching, abnormal darkening and thickening of roots.

Molybdenum is a component of two major enzyme systems involved in the nitrate reeducates, this is the process of conversion of nitrate to ammonium.

Often interveinal chlorosis which occurs first on older leaves, then progressing to the entire plant. Developing severely twisted younger leaves which eventually die. Molybdenum deficiencies frequently resemble nitrogen, with older leaves chlorotic with rolled margins and stunted growth. Excess may cause discoloration of leaves depending on plant species. This condition is rare but could occur from accumulation by continuous application. Used by the plant in very small quantities. Excess mostly usually does not effect the plant, however the consumption of high levels by grazing animals can pose problems so she might not be too good to smoke.

Sodium seems to encourage crop yields and in specific cases it acts as an antidoting agent against various toxic salts. It may act as a partial substitute for potassium deficiencies. Excess may cause plant toxicity or induce deficiencies of other elements. If sodium predominates in the solution calcium and magnesium may be affected.

Silicon usually exists in solution as silicic acid and is absorbed in this form. It accumulates as hydrated amorphous silica most abundantly in walls of epidermal cells, but also in primary and secondary walls of other cells. It is largely available in soils and is found in water as well. Inadequate amounts of silicon can reduce tomato yields as much as 50%, cause new leaves to be deformed and inhibit fruit set. At this time toxicity symptoms are undetermined.

Cobalt is essential to many beneficial bacteria that are involved in nitrogen fixation of legumes. It is a component of vitamin B12 which is essential to most animals and possibly in plants. Reports suggest that it may be involved with enzymes needed to form aromatic compounds. Otherwise, it is not understood fully as to its benefit to plant growth, but it is considered essential to some animal health issues.


Do you have hard water?

Be sure to check out your PPM of the water you will be using in your grow! Too much calcium will will hurt your plants.


Too much calcium will cause magnesium deficiencies, among others.

The most common cause of calcium and magnesium deficiencies is lockout. When there is too much cal-mag already in the untreated source water being used as the base to the nutrient formula it can cause the good cal-mag in the plant food to become unavailable. Think about it this way - the cal-mag in your tap water has a large molecular structure and is very immobile in that form. These molecules try to go through your roots and up into the plant where they can be used. The molecules are too large to be absorbed efficiently and end up accumulating on the outside of the roots. This causes a road block that can lock out the good forms of cal-mag you are trying to feed them. Other key components of the nutrient formula can also be locked out and the problems escalate until your plants appear to be stunted and yellow and growth crawls to a halt. There are ways to mitigate this problem. Fulvic and humic acid, as well as living beneficial biology, can help break down the relatively immobile cal-mag in your tap water and allow it to become more available to the plants. This process takes time and is not guaranteed to free up all the cal-mag in an efficient manner. The whole idea behind hydroponics is to minimize your time and maximize your harvests. There is no time to wait around for the cal-mag to be made available. What the plants need is cal-mag that they can readily absorb and use immediately. Another way to acquire deficiencies is by not adding enough cal-mag to your nutrient formula when using purified water. Reverse Osmosis gives you the purest water possible and so you have to add the correct amount of cal-mag to ensure you have the proper feed solution. The best way to start your nutrient formula is to begin with purified water, add 50 to 250ppm cal-mag, and then add your additional macro- and micronutrients. The amount of cal-mag you add depends on the variety of plants, what stage in their life they are in, and the media you are using. Certain growing media, such as coco coir, requires additional calcium due its cation exchange capacity properties. Growing in coco requires additional calcium, especially in the first few weeks of the plants life. Best Practices to Avoid Problems The most ideal way to avoid deficiencies is by starting with a base of purified water. That way you are not guessing how much cal-mag you have and you won’t be as susceptible to lock out problems. Reverse osmosis technology removes 95 to 99 per cent of all contaminants and the most efficient method to rid your tap water of the majority of cal-mag and other PPMs. After having the cleanest base available you want to select cal-mag that is formulated specifically for horticulture. Going beyond this, look for labels that list several different sources or compounds of cal-mag and ensure that they have been chelated to make them that much more available to your plants. If growing organically, it is paramount that you select cal-mag supplements that have been chelated naturally with amino acids or living biology. By using these highly absorbable forms of cal-mag you are helping to ensure the healthiest and quickest growing plants. Some nutrient manufacturers address the excessive cal-mag in tap water by marketing hard water formulas. “Although a grower can use a hard water formula for his or her plants, it doesn’t mean they should,” said Brantley Pierce of Green Coast Hydroponics. “In many relations, people are the same as plants - what you put in is what you get out. We can feed ourselves fast food everyday to become full, but it doesn’t mean that is the best choice for living. Starting with R.O. water and building a quality nutrient profile from scratch is like home cooking. It takes more preparation and time but the results equal a higher quality of life.” Finally, there are some brands of cal-mag that have been super chelated with living biology and are readily available to your plants. These types of cal-mag can actually be foliar sprayed on the leaves and absorbed in a matter of hours. Results can be seen amazingly fast and deficiency problems can be corrected in a matter of days. In conclusion, it is clear that calcium and magnesium play significant roles in everyone’s garden. Having the proper forms and correct amounts will determine the final outcome of your harvest. Starting with a base of purified water and supplementing the feed formula with specific, very usable forms of cal-mag will ensure healthy and happy harvests. Pure water is the platform for continued success in the garden.

control of pests in your marijuana garden.





Thrip infestation can be seen by looking for excrament, black dots.

Thrip enzyme enjected into leaf surface

Thrip silvery leafe damage, a tell tale sign.

Thrip video

Thrips on a marijuana leafe

Thrip entire life cycle

Thrips are slender, yellow or brownish, winged insects about 1/25 inch long. They have fragile wings which keep them aloft while they are blown by the wind. Thrips have a cone-shaped mouthpart, which they use to cut stems in order to suck plant juices. The larvae look like adults, but are smaller and wingless. Most thrips feed on a range of plants, especially onion and other bulbs, and marijuana is at most a marginal part of their diet. A well-cultivated marijuana plant can outgrow most damage that thrips are likely to inflict.

Signs of Thrip Damage
Early into your gardening, you have to devise on ways how to kill thrips. With thrips barely visible to the human eye, organic gardeners have to decipher early signs of thrip damage with an eye for detail and a magnifying glass. Be wary of puncture-like marks on leaves and a splotchy or speckled appearance especially near the tips of plants. Thrips are unusually attracted to the colors pink and blue. Put pink or blue sticky traps near suspected infestation as an indicator of the infestation.

When they feed, they pierce the leaves and flowers and feed on pollen. The damaged areas dry out, becoming speckled and silvery. Petals often turn brown. The insects are so small, sheltering beneath leaf sheaths and in buds, that they are seldom seen. To find them, hold a sheet of white paper beneath the plant and tap the stems sharply. The thrips will fall on to the paper where they are clearly visible. Be warned: some people find that thrips are an irritant to their skin.

A solution for thrips

Step 1
Gently shake the plant while holding a piece of white paper underneath to see if thrips are present. The bugs are 1/25 inch in size and their dark fecal pellets will fall onto the piece of paper.

Step 2
Remove leaves infected with thrips and destroy them by placing them in a sealed plastic bag to prevent the bugs from spreading. Do not put thrip infested foliage in a compost bin.

Step 3
Remove plants that are wilting or completely defoliated from thrips as the plants will not recover. Do not place the plants or infected leaves in in a garbage close to the grow room. Be sure all infected plant matter is sealed. Inspect and treat surrounding plants to make sure the thrips have not spread.

Step 4
Spray the plant with water to knock off any thrips present. Make sure to spray under the leaves to remove thrips from all areas of the plant.

Step 5
Spray infected plants with three applications of Pyrethrum spray after an infestation has been discovered. Each application should be one week apart. Make sure to spray the plant blossoms and under the leaves to treat all areas.
Spray the plants with Spinosad bacteria.
Spinosad is a bacteria that is harmful to humans and most mammals but deadly to Thrips. Once they orally ingest the bacteria they die quickly. There is a product called Monterey Garden Insect Spray that is concentrated Spinosad. You mix it according to directions and spray both the underside and over side of the leaves on your plants. You cover the entire plant with the Spinosad spray. This will also last up to 3 weeks and is extremely effective. You will notice an almost instant devastation to the Thrip population. Once they ingest the tiniest amount of the Spinosad bacteria they die. Let plants dry. it's best to spray them just before the lights go out. Best of all Spinosad is totally organic.
repeat after 7 days, to get the eggs that are now viable for the insecticide.

Step 6
Keep the plants well watered and raise the humidity slightly, Thrips do not like moisture.

Repeat the three application cycle of Pyrethrum spray if the thrips return

Spider Mites

Spider Mite.

Spider mites are first seen on undersides of leaves.

Signs of Spider Mites: Know what to look for when diagnosing the early stages of a spider mite infestation. *Small (pin point) yellow or brown dots on the leaves of the plant (as shown in this image).
*Very small strands of silk webbing on the plant, particularly underneath the leaves.
*Small (pin point) white dots on the underside of leaves (these are the eggs).
*Little buggers (depending on them ol' peepers of yours, you may need a magnifying glass to spot them!)

Spider mites are the bane of marijuana growers. Mites are not insects, but arachnids, the same family as spiders. They have eight legs. Your garden is probably infested with two spotted mites. When looking through a loop or magnifying glass, two black spots are visible on the pest's back. Gardens are also infrequently infested with the red spider mite. Spider mites are about the size of a poppy seed. They insert a tube into the plant and suck out its juices. Indoors, where they are not combating nature's challenges, mites multiply quickly and overwhelm gardens. Mites lay eggs after they mature, about two weeks after hatching. The females lay thousands of eggs over their lifetime. They hatch in about three days. Mites inhabit the underside of the leaf and are not readily apparent. The first indication of their presence is usually the sight of tiny brown spots circled by small yellow areas. These areas indicate sites where mites have used their proboscises to puncture the leaf surface and suck the plant's sweet juices. As the population increases they begin to build webs and can be seen commuting from one feeding area to the next.

There are varying degrees of treatment. I will include both natural remedies, and miticide methods.

Natural mite control

Ed Rosenthal suggests a natural remedy:
If your plants are growing vegetative you have quite a few options. First you can wash them with a moderately vigorous spray to knock down the mite population. This will help the plants by lessening their loss of vital juices. Prepare a spray with a teaspoon of real soap such as Dr. Bronner's peppermint or eucalyptus liquid soap per gallon of water, or spray with Safer's horticultural soap to help dislodge and suffocate the pests. Mites are found on the underside of the leaves and must be sprayed there. If the plants are small or easy to handle it might be easier to dip them in the soapy water. Spraying can remove most but not all the mites, and it doesn't remove the eggs. -ed Rosenthal
Neem oil has increased in popularity and is a natural product that will kill mites on contact, some claim that it kills the eggs too. I have included a video on treating with neem oil below.

Neem oil is a natural miticide derived from the nuts of the Neem tree, which is found in India. Kills on contact.


mitacides come in many brands: Dicofol (=Kelthane) is registered for over-the-counter use but is difficult to find. Acephate (=Orthene), dimethoate (=Cygon), chlorpyrifos (=Dursban), diazinon, disulfoton (=Di-syston), and malathion have over-the-counter product labels but are considered weak miticides. Avermectin (=Avid), bifenthrin (=Talstar), dienochlor (=Pentac), fenbutatin-oxide (=Vendex), fluvalinate (=Mavrik), oxamyl (=Vydate), oxydemeton-methyl (Metasystox-R), oxythioquinox (Morestan), and propargite (=Omite) are restricted use pesticides available only to licensed applicators.

When using a miticides, be aware the eggs are not killed by miticides. You will need to tread for mites in a series of steps over several weeks. Spray mitacide then re-spray 6 days later, then again 6 days later. Mite eggs will hatch in 3-7 days.

Use caution as a mite population in your grow room will become resistant to a particular miticides, if you use it over and over. Alternate miticides could serve you well.

Ultimately, the solution to the mite problem and the pest problem in general is to prevent the garden from becoming infected. Following certain simple rules will help: Wear freshly washed clothes or change into a garden outfit when going into the garden. Never work outdoors, especially in a garden or other vegetative or turf area right before working in your indoor garden. Pests are frequently carried in on shoes. Do like Mr. Rogers and change your footwear before you enter the garden. Don't use outdoor soil, tools or containers in the indoor garden.
-Staff NewPatientConnection.


Fungus nats

fungus nat

Fungus gnats thrive in overfertilized, over-watered grow mediums, especially those where organic fertilizer high in nitrogen has been used. Gnats can be killed by disturbing soil, heating soil, by predatory wasps, and by applying insecticidal soap, neem, rotenone, and garlic oil to gnat infestations




OMMP Questions and answers


1) Can the OMMP refer me to a physician?

No. The OMMP does not serve as a referral source. Any Doctor of Medicine (MD) or Doctor of Osteopathy (DO) licensed in Oregon can recommend a patient for the program.

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2) Where do I get the seeds or plants to start growing medical marijuana?

The OMMP is not a resource for the growing process and does not have information to give to patients.    

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3) I do not have the money for the application fee. Is it a one-time payment? Can it be waived? Can I make installment payments? Will my insurance pay? Can I pay with my credit card?

The answer to all these questions is “no”. The fee must be paid in full with each new or renewal application. Make your check or money order payable to “State of Oregon”. Cash payments are accepted at the State Office Building cashier’s office in Portland. A 10-day hold will be placed on the issuance of cards paid by personal check.

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4) Why do I need to have a physician sign and date the form or send a chart note to the OMMP? Why can’t I just provide my medical records?

According to the Oregon Medical Marijuana Act (Section 3 (2)(a)), and OAR 333-008-0020(1)(c), a physician must state in writing that the patient has a qualifying debilitating medical condition and that medical marijuana may mitigate the symptoms or effects of that condition. The OMMP accepts medical records as long as they clearly state the physician is aware that medical marijuana is being used as a treatment and he or she believes the patient may benefit from the use of medical marijuana. The physician must sign and date the relevant portions of medical records you send to the OMMP.  The OMMP contacts each physician during the application process to verify the patient is under the physician’s care. A signed and dated “Attending Physician’s Statement,” copies of chart notes or medical records must be current within 3 months of the date of a person’s new or renewal application. 


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5) Why are only MDs (Medical Doctors) and DOs (Doctors of Osteopathy) qualified to sign the “Attending Physician’s Statement” of the application?  Why not naturopaths, chiropractors, or nurse practitioners?  Does the physician have to be licensed in Oregon?

The Oregon Medical Marijuana Act states that an “attending physician” means a Doctor of Medicine (MD) or Doctor of Osteopathy (DO) licensed under ORS chapter 677 (OAR 333-008-0010(3)).  MDs and DOs are the physicians licensed under this chapter. The law also specifies that a physician must be licensed in Oregon. The OMMP verifies with the Board of Medical Examiners that each patient’s attending physician has a valid license to practice medicine in Oregon and has no disqualifying restrictions.

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6) Do I have to list a “grow site” address on my application (that is, the address where I plan to grow my medical marijuana)?

Yes.  OAR 333-008-0025(1) requires the patient to provide the OMMP with the address where his or her marijuana will be manufactured or produced--that is, a “grow site” address.  The departments will only register one grow site address per patient and will only register grow sites in Oregon.

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7) Do I have to tell my landlord that I am a patient in the OMMP?  Can my landlord evict me if I am a patient in the OMMP and have my grow site in my rental housing?  Can I live in subsidized housing and be a patient in the OMMP?

It is up to you to decide whether or not to tell your landlord that you are a patient in the OMMP.  Nothing in the OMMA specifically addresses whether or not you can be evicted because you are a patient in the OMMP, even if you have only the amount of medical marijuana allowed by law.  Nothing in OMMP laws specifically addresses whether or not a person can be an OMMP patient and live in subsidized housing.  If you have questions about these important issues, the OMMP recommends you talk to an attorney to learn about your rights and protections.

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8) Do I have to tell the OMMP if I change my mailing address, add or remove a designated primary caregiver, person responsible for grow site, or change my my grow site address?

The answer to all these questions is “yes”.  You are required to tell the OMMP in writing of any such changes within 30 days of the change. The OMMP does not accept changes of information over the telephone. The OMMP only accepts written changes about the patient’s address, designated primary caregiver, person responsible for a grow site, or grow site from the registered patient. You may send your changes to the OMMP by mail, in person, or fax. You will get written confirmation from the OMMP that the change was received. Your changes will be made in our computer database and will be put in your file. You will be protected from civil and criminal penalties for these changes. If you change your caregiver and/or grower, you will be asked to return your old caregiver and/or grower card within 7 days.

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9) What happens to my application once I mail it?  What if I don’t send in all the required parts of my application?

The OMMP will review your application to make sure it is complete and all parts are current. If your application is complete, you will get a “complete letter” from the OMMP letting you know your registry identification card will be issued within 5 days after the OMMP verifies the information on your application. On the same day the OMMP sends you a “complete letter,” we mail a “verification letter” to your attending physician and will conduct a criminal background check on the person responsible for the grow site. The purpose of the letter to your physician is to verify that you are a patient of this physician and that you are affected by a debilitating medical condition covered by the Oregon Medical Marijuana Act, and that medical marijuana may reduce the symptoms of your condition. If you are renewing your application, the verification letter to your attending physician is to verify that you are his or her patient. 


If you don’t send in all the required parts of your application per OAR 333-008-0020, the OMMP will send you an “incomplete letter” telling you what parts of your application are missing.  The incomplete letter gives you 14 days from the date of the letter to get the missing parts to the OMMP and tells you the terms under which your application may be terminated.  When you get all missing parts of your application to the OMMP, you will be sent a “complete letter” and the OMMP will verify your status with your attending physician. 

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10) Do I need to keep a copy of my application and any other information I send to the OMMP?

Yes!  Per ORS 475.309(9) If your application has not yet been approved, denied or terminated you may provide law enforcement with a copy of your written documentation submitted to the department; you must also submit proof of the date of mailing or other transmission of the documentation. This documentation shall have the same legal effect as a registry identification card, until such time as you receive your card or you have received notification that your application has been approved, denied or terminated.

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11) Who can ingest medical marijuana?

Under the Oregon Medical Marijuana Act, only a person with a qualifying debilitating medical condition who has obtained a valid Oregon Medical Marijuana Program card is excepted from criminal laws of the state for engaging in the medical use of marijuana as justified to mitigate the symptoms or effects of the person's debilitating medical condition.

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12) Why can’t I go to a pharmacy to fill a prescription for medical marijuana?

Pharmacies can only dispense medications “prescribed” by licensed medical practitioners. The federal government classifies marijuana as a Schedule I drug, which means licensed medical practitioners cannot prescribe it. 

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13) Is the Oregon Medical Marijuana Act recognized by other states?  Can I travel to another state with medical marijuana and my OMMP registry identification card and not be arrested or charged with civil or criminal penalties?

At this time, the OMMP is not aware of any “reciprocity” agreements with any other states to honor the Oregon law. This includes even those states that have medical marijuana laws of their own, such as Washington and California. Because Medical Marijuana programs vary by state, you may want to contact the state you are traveling to for information on their laws.

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14) Is my confidentiality protected?

Yes. The OMMP does not give out lists of patients, caregivers, or growers.  Law enforcement personnel may contact the OMMP or access the 24/7 Law Enforcement Data System (LEDS) only to verify a specific name or address of a patient, caregiver or person responsible for a grow site.  The OMMP will tell law enforcement staff if the patient, caregiver, or address in question is registered, or if an application is in process.  The OMMP will disclose patient information to others only at the specific written request of the patient.  OMMP computer files are secure and paper files are kept locked when not in use.

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15) What should I tell my employer if I am subjected to a drug test?

The Oregon Medical Marijuana Act states that employers are not required to accommodate employees who use medical marijuana.  You may wish to consult an attorney about whether or not to tell your employer that you are a patient in the OMMP.  A patient may contact the OMMP in writing to ask the Program to release information about the patient’s registration to an employer.

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16) I live within 1000 feet of a school, AKA a “drug free zone”.  Can I still grow and/or possess my medical marijuana there?

The Oregon Medical Marijuana Act (OMMA) does not address this issue.  You may wish to contact an attorney about this issue.

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17) Can I have someone else sign and date my application (a “proxy") if I am physically unable to do so?

Yes, as long as the individual signing your application identifies him or herself as your proxy next to his or her signature on your application or has provided documentation showing guardianship or power of attorney.

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18) How are the laws and rules of the OMMA enforced?

The OMMP enforces the registration process making sure applications are complete before issuing a registry identification card, terminating incomplete or fraudulent applications, and suspending cards if persons commit violations of the OMMA.  The OMMP verifies the names and addresses of patients, caregivers, and grow sites with local and state law enforcement personnel if they call the OMMP requesting such information.


Local and state law enforcement agencies enforce the OMMA around the State, they may verify with the OMMP at any time whether a particular patient, designated primary caregiver, person responsible for a grow site, or grow site location is registered with OMMP.


Local and state law enforcement personnel may take any action they believe is necessary to enforce the criminal laws of the State, including violations of the OMMA.  Local and state law enforcement actions may vary from county-to-county and district-to-district.  The OMMP has no authority to direct the activities of local and state law enforcement agencies.

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19) Can I use marijuana while on parole/probation if I have an OMMP card?

"The authorities that are responsible for your probation/parole/post-prison supervision can impose restrictions on your possession and use of medical marijuana as a condition of your supervision, even if you have a valid OMMP card.  Most offenders' supervision is subject to an “obey all laws” condition.  Since marijuana possession and use is illegal under federal law, the Oregon Department of Justice has concluded that supervisory authorities can sanction an offender for possessing marijuana, even if he or she has an OMMP card.  Sanctions could result in your arrest and return to jail.


If you are on probation, parole, post-prison supervision, or other form of conditional supervision for conviction of a crime, you should consult with your parole and probation officer regarding whether your possession or use of marijuana may subject you to sanction for violation of the conditions of your supervision."


The OMMP will revoke the card of a cardholder if a court issues an order that prohibits the cardholder from participating in the medical use of marijuana or otherwise participating in the OMMP.

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20) Who qualifies for the reduced fee?

To be eligible for the reduced fee of $20.00, a patient must provide current proof that he or she receives food stamps, Supplemental Security Income (SSI) benefits, or is eligible for the Oregon Health Plan (OHP).  The patient must provide a current eligibility statement at the time he or she is submitting his or her medical marijuana application.


Programs that DO NOT qualify for a reduced fee are as follows but not limited to: Social Security Disability Insurance (SSDI), Social Security Benefits (SSB), or Medicare. A copy of your Food Stamp card (Oregon Trail Card) alone is NOT proof of eligibility.

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21) Can a patient withdraw from the program?

Yes. A patient must submit a written statement that he or she wishes to withdraw from the Program. The Program will request that all cards be returned and the file will be closed. The patient’s card and all cards associated will be voided. It is the responsibility of the patient to notify his or her grower and caregiver, if applicable, that his or her card is no longer valid. It is the patient’s responsibility to collect all cards associated with his or her patient card and return them to the department. If the Department is notified by the patient that he or she would like to withdraw from the program, the Department shall notify the primary caregiver and/or grower by mail at the address of record informing the caregiver or grower that his or her card is no longer valid and must be returned to the Department within 7 calendar days.  All cards must be returned to the Department within seven (7) calendar days of the date that the Department was notified of withdrawal. If the patient so chooses he or she may reapply as a new patient at any time. In order to reapply a patient must submit the required documentation and application fee as outlined in OAR 333-008-0020.

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22) Do patients get a refund if they withdraw from the program?

Yes and No. No refund will be given for patients who withdraw once their cards have been issued. A refund may be given to a patient who withdraws before cards are issued. However, the department may charge a 25% processing fee.

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23) Can the OMMP give me legal advice?



Marijuana Tincture, how to make an alcoholic marijuana potion

A tincture prepared from white
willow bark and ethanol.

In medicine, a tincture is an alcoholic extract (e.g. of leaves or other plant material) or solution of a non-volatile substance; (e.g. of iodine, mercurochrome). Like tincture of Cannabis sativa. To qualify as a tincture, the alcoholic extract is to have an ethanol percentage of at least 40-60% (sometimes a 90% pure liquid is even achieved). [1] In herbal medicine, alcoholic tinctures are often made with various concentrations of ethanol, 25% being the most common. Other concentrations include 45% and 90%. Herbal tinctures do not always use ethanol as a solvent, though this is the most frequent. Other solvents include vinegar, glycerol, ether and propylene glycol, not all of which are used for internal consumption. However, the advantage of ethanol is that being close to neutral pH, it is a good compromise as a solvent of both acidic and alkaline constituents. Glycerine is a poorer solvent generally and vinegar, being acidic, is a better solvent of alkaloids but a poorer solvent of acids, which would result in the alkaloids being more active in the preparation than otherwise. However, for people who do not imbibe alcohol for medical, religious or moral reasons, non-alcoholic tinctures are a possible alternative. Solutions of volatile substances were called spirits, although that name was also given to several other materials obtained by distillation, even when they did not include alcohol. In chemistry, a tincture is a solution that has alcohol as the solvent.



pro's and cons of medical marijuana-Pete Hastings, New Mexico





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hydroponics is a topic were are adding soon. If you enjoy hydroponics and wish to see a section of our Oregon OMMP web page dedicated to hydroponics then email us your thoughts on hydroponics.
Hydroponics, marijuana water care, marijuana hydroponics, marijuana ph of soil or medium. Hydroponics water ph and hydroponics temperature control. We are also going to offer advanced hydroponic step by step hydroponic construction.

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