You are viewing all Organic Growers Supply products related to “Cannabis Growing Supplies.”

Amendments and Fertilizers


Blood Meal
8280 (12-0-0) Fastest release time of any organic nitrogen source. Highly recommended for corn. The smell (understandably) freaks out deer. Side-dress... read more
Bone Char
8283 (0-16-0, 32% P2O5, approx. 30% Ca) Burned bone meal provides large amounts of readily available phosphorus. The most economical source of P for... read more
Fish Hydrolysate with Kelp
8292 (2-5-0.2) All the N, P & K of fish, along with the micro-nutrients and growth hormones of kelp. Can be used as a foliar feed, in drip irrigation... read more
Seabird Guanoout-of-stock
8298 (12-11-2) Etymologically, the word guano is derived from the (indigenous Andean) Quechua word for poop. Biologically, guano is manure from bats or... read more
Shrimp Meal
8304 (A size 5.7-10-0, B & C sizes 4-5-0, both approximately 14% Ca) From USDA-inspected shrimp processing facilities. Cooked and dried at low... read more


8195 (94% CaCO3) When the price of aragonite spiked a few years ago, we tried to steer growers toward the chemically identical Calcitic Limestone, but... read more
Azomite, Coarse
8213 (0-0-0.2, 5% Ca) Named for its A-to-Z of Minerals including Trace Elements; contains over 67 minerals beneficial to plants and animals.

A mix of

... read more
Azomite, Micronized
8216 (0-0-0.2, 5% Ca) Named for its A-to-Z of Minerals including Trace Elements; contains over 67 minerals beneficial to plants and animals, including... read more
BrixBlend Basalt
8222 (49.3% SiO2, 13.3% Al2O3, 9.2% CaO, 5.7% MgO, plus trace minerals) A paramagnetic stone powder from the Pioneer Valley of Massachusetts for... read more
Calphosout-of-stock, clearance
8225 (0-3-0, 20% Total P, 20% Ca, trace minerals) This soft-rock phosphate is an excellent choice for calcium-deficient soils as plants will take up... read more
Granite Meal
8231 Contains about 5% potassium in very slow-release form. Plants need potassium for sugar and starch production. Granite meal can be added to the... read more
Greensandout-of-stock, clearance
8234 (49.3% SiO2, 3.72% Fe) “Greensand has been successfully used for soilbuilding for more than 100 years,” according to Rodale’s Encyclopedia of... read more
Gypsum, pelletized
8204 (Calcium Sulfate CaSO4•2H2O, 23% Ca, 17% S) Gypsum is a good source of calcium when the pH is already at a desired level. The sulfur in gypsum... read more
Monterey Epsom Salts
8228 (9.8% water-soluble Mg, 12.9% S) Magnesium is a building block of chlorophyll and therefore essential to efficient photosynthesis. In... read more
Phosphate, Tennessee Brown Rock
8252 (0-4-0, 23% total P2O5) The consistency of rich soil. Comes from the washing piles left behind when high-grade ore was extracted to produce... read more
Pro Pelleted Calcitic Limestone
8198 Pro-Select Prill (87% CaCO3, 7% MgCO3). Cal Carb Equivalent 95.8%. The most common and most frequently used soil conditioner. Calcitic is the... read more
Pro Pulverized Dolomitic Limestone
8201 (53% CaCO3, 42% MgCO3). Cal Carb Equivalent 102.9%. Use to sweeten soil (raise pH) and provide calcium where excess magnesium is not a problem.... read more


Alfalfa Meal - Organic
8260 (2.8-0.5-3.6 avg.) Popular among veganic gardeners, and hands-down the best-smelling fertilizer out there. Excellent alternative to blood meal as... read more
Kelp Meal - Organic
8263 Dried and ground seaweed contains trace minerals, enzymes and amino acids, plus a small dose of N-P-K. An excellent source of naturally chelated... read more
Kelp-It Soluble Powder Dehydrated Seaweed Extract
8266 NPK: 0-0-18. Highly concentrated extract makes an excellent foliar spray containing growth hormones, trace minerals, enzymes and carbohydrates.


... read more
Liquid Kelp
8269 Maine-harvested kelp, Ascophyllum nodosum, is a source of growth-promoting and -regulating hormones. Use when starting seeds to improve seed... read more
Neem Cake
8272 (5.7-1.2-2.9) Pure full-strength neem cake—the residue of neem seed kernels after the oil has been pressed. Rich in the basic nutrients, nitrogen,... read more
Soybean Meal
8275 (7-1.5-3 avg.) High levels of nitrogen and potassium are released as the soybean meal breaks down, providing fertility over time. Add when first... read more

Planting Mixes

Planting Mix
8309 (3-2-2.5) The fertilizer formerly known as Bulb Planting Mix is still perfectly suitable for this purpose, but we are rebranding it to emphasize... read more

Compost and Potting Soil

Compost and Potting Soil
8369 Dan K., a faithful OGS customer with a flair for experimentation, developed this mix and was kind enough to share his formula with us. He says,... read more
Compost and Potting Soil
Coast of Maine Quoddy Blend™ Compost
8356 Blend of composted lobster, crab, peat, bark and cow manure. Rich in micronutrients. Ideal for flower and vegetable beds. read more
Compost and Potting Soil
Coir Blocks
8380 This premium washed low-EC coconut coir is a biodegradable and environmentally sound substitute for peat moss. Compressed blocks of coconut fibers... read more
GreenTree Growers’ Blend™currently on backorder
8363 A lighter blend of coir, sphagnum peat and organic nutrients. Recommended for small seeds, early growth and any plants that prefer high air... read more
Compost and Potting Soil
GreenTree Ithaca Blend™
8368 A premium high-test potting soil. Coir, sphagnum peat, and worm castings form the base of this top-quality mix; GreenTree’s own biochar is added... read more
GreenTree NoFloat™Clearance
8386 Coir goes tech. GreenTree combines different size grades of washed and buffered coir fibers to an exacting formula that results in a high-porosity... read more
Compost and Potting Soil
8389 Volcanic glass that has been heated until it “pops” like corn, resulting in a lightweight, porous and stable material. Widely used in potting... read more
Rainbow Valley Compostcurrently on backorder
8362 This top-quality compost, made in Sidney, Maine, from organic cow and poultry manure, comes highly recommended by farm advisor Mark Fulford. The... read more
Compost and Potting Soil
Raw Biochar
8348 Join the carbon-farming revolution. Biochar is the product of heating organic matter in a low-oxygen environment: instead of releasing the carbon... read more
Compost and Potting Soil
Rice Hulls
8392 A great alternative to perlite in your growing medium—carbonaceous, renewable and less dusty to mix. May be included at up to a third of your... read more
Compost and Potting Soil
Superworm Frass
8351 (2-2-2), 16% Chitin. As if “darkling beetle” didn’t already sound like the nightmare invention of a fantasy novelist, the manufacturers of this... read more
Compost and Potting Soil
Vermont Compost Fort Vee™ Potting Soil
8371 Blond sphagnum peat, compost, vermiculite and coir with a blend of organic and mineral amendments. Widely used by growers who make soil blocks.... read more
Compost and Potting Soil
Worm Castings
8350 (0.5-0.5-0.3 avg. and trace minerals) Research at Ohio State University indicates that adding 10–20% worm castings by volume to potting mixes... read more


Chocolate Mulch
8400 The only mulch that might sabotage your diet resolutions—it really does smell like chocolate! The shells of the cocoa bean make an excellent... read more

Farm Seed


Dutch White Cloverout-of-stock, Sold out for season
8040 Trifolium repens Perennial legume. At only 6", the lowest-growing white clover. Shade-tolerant perennial. Our most popular clover. Seed at... read more


Magic Carpet Mix
8062 You told us your dreams, and we designed this ten-way clover-heavy mix as a soil-building living mulch for use under tall-growing competitive... read more

Inoculants and Probiotics


Dr. Higa’s Original™ EM-1 Microbial Inoculant
8185 Microbial Inoculant Concentrated Effective Microorganisms®. Active microbial life in the soil and on plants is a better solution than synthetic... read more
Mammoth P
8180 Active Microbials Nutrient Liberator. Invented by a team of Colorado State University PhD soil microbiologists with a passion for soil health and... read more
Monster Plant Mojo
8189 (4-4-0.5) We were devastated by the demise of well-loved MPM (Microbial Plant Mix) foliar fertilizer, the proprietary blend of a manufacturer... read more
MycoApply Endo/Ecto
8176 Four species of endomycorrhizal fungi, 7 species of ectomycorrhizal fungi, 5 species of beneficial bacteria and a high-quality slow-release 5-3-2... read more


BioNutrients™ Soluble AGout-of-stock, supplier stopped making
8192 (8-1-9) Provides a quick boost of plant nutrients (derived from fish and fermented plant extracts) fortified by humic acid and kelp extract plus... read more
Essential® Plus 1-0-1out-of-stock, manufacturer labeling error
8190 A high-powered organic blend of kelp concentrate, fish hydrolysate, potassium humate and yucca, designed to stimulate root-hair growth for... read more
Fulvic Acid Liquid
8170 Fulvic acid is a powerful antioxidant and chelator: one molecule can transport 60 or more minerals into plant cells for a more efficient and... read more
Humic Acids SP
8167 A dry soluble powder with humic acid concentration of 85%. Derived from the mineral leonardite.

Humic acids are the wild-card molecules of soil

... read more



Garden Irrigation Starter Kit
9098 Garden row-crop kit for 200' of irrigation uses low-flow drip tape for a uniform distribution of moisture along the tapes.

Get started from the

... read more



Attracting Beneficial Bugs to Your Garden: A Natural Approach to Pest Control
9489 by Jessica Walliser, 240 pages, 8x9, softcover. It’s mid-August and the tomatoes are just starting to ripen. You go out in the evening and are... read more
Teaming with Fungi: The Organic Grower’s Guide to Mycorrhizae
9777 by Jeff Lowenfels, 172 pages, 6x9, hardcover. This book brings the trilogy to a close. As in the first two Teaming books, Lowenfels delves into... read more
Teaming with Microbes: The Organic Gardener’s Guide to the Soil Food Webout-of-stock
9780 by Jeff Lowenfels and Wayne Lewis, 220 pages, 6¼x8¼, hardcover. Part the dusty veil of classic soil chemistry. Move beyond the soil test and mind... read more
What’s Wrong with My Marijuana Plant?: A Cannabis Grower’s Visual Guide to Easy Diagnosis and Organic Remedies
9813 by David Deardorff and Kathryn Wadsworth, 192 pages, 7½x9½, softcover. The only book dedicated to a single species in the widely popular “What’s... read more

Livestock Supplies


Molasses - Organicwarehouse walk-in sales only
8497 Molasses is a common and cost-effective feed additive used for many purposes. Add it to your animals’ drinking water in cold weather, where it... read more

Plant Protection and Pest Control


Actinovate® Biological Fungicideout-of-stock, supplier ceased, no replacement
8702 Supplies beneficial bacteria Streptomyces lydicus, which will colonize the roots or foliage of plants and provide protection against disease and... read more
Bonide® Liquid Copper Concentrate
8672 A copper fungicide for the home gardener. Copper is a very effective fungicide, but regular use may result in problematic concentrations of copper... read more
Cease® Biological Fungicide
8710 Why, oh why do we have so much trouble keeping Bacillus subtilis products on the shelf? We had to nix Serenade because we don’t want to give money... read more
8666 Broad Spectrum Foliar Fungicide. A potassium bicarbonate formulation to prevent powdery mildew, Alternaria blight, Anthracnose, black spot,... read more
Monterey Bi-Carb Old Fashioned Fungicide
8665 Microencapsulated potassium bicarbonate for homeowner control of powdery mildew on all common crops and ornamentals. When Great-Grandma got... read more
Monterey Complete Disease Control Biofungicide/Bactericide
8709 Bacillus amyloliquefaciens formulation for broad-spectrum control of bacterial and fungal diseases on vegetables, fruits, nuts, ornamental trees,... read more


DiPel® DF
8753 Biological insecticidal dry flowable wettable powder. Commercial strength Bt (Bacillus thuringiensis subsp. kurstaki), approx 32,000 IU/mg.... read more
General Hydroponics AzaMax®
8735 Botanical Insecticide/Miticide/Nematicide with azadirachtins A & B derived from neem oil. AzaMax is more processed than neem oil, but this liquid... read more
Ladybug Attractant
8734 Let Mother Nature do your dirty work! Instead of reaching for pesticides every season, use this pheromone lure to attract ladybugs and other... read more
Monterey Bug Buster-O
8768 When the squash plants are eaten halfway to the ground or you can’t see the rose bushes under the layer of Japanese beetles, it’s time to reach... read more
Monterey Sluggo®
8741 A blend of iron phosphate, a naturally occurring soil mineral, with snail and slug bait. Many species of snails and slugs are attracted to the... read more
Monterey Sluggo® Plus
8744 Insect, Slug & Snail Pellets. The addition of a small amount of spinosad (0.07%) greatly increases the effectiveness and scope of Sluggo.


... read more
PyGanic® Crop Protections EC 5.0 II
8765 Pyrethrin is a botanical insecticide derived from a chrysanthemum, Tanacetum cinerariaefolium, grown in Kenya and Tasmania, with low toxicity for... read more
Safer® Brand Caterpillar Killer
8756 for Trees, Shrubs & Vegetables Concentrate II. Liquid concentrate Bt (Bacillus thuringiensis subsp. kurstaki) Labeled for a variety of caterpillar... read more
Safer® Insecticidal Soap Commercial Concentrate
8738 Biodegradable contact insecticide effectively controls mites, aphids, earwigs, lace bugs, leafhoppers, mealybugs, scale, spider mites, thrips,... read more

Orchard and Garden Health

Orchard and Garden Health
Ahimsa Organics® Karanja Oil
8663 Eastern tradition and Western utilitarianism meet again! Enlightened growers of veggies, fruits and medical ganja convinced us to bring back... read more
Orchard and Garden Health
Ahimsa Organics® Neem Oil
8660 Promotes the health and vitality of trees and plants. Neem has long been recognized for its antifungal, antibacterial and antiparasitic... read more

Orchard and Garden Pest Patrol

Orchard and Garden Pest Patrol
Sticky Strips
8648 Conventional and organic growers alike commonly use sticky strip traps as part of their integrated pest management programs, to monitor the... read more
Orchard and Garden Pest Patrol
Tree Tanglefoot Insect Barrier®
8624 A very sticky substance made of castor oil, natural gum resins and vegetable waxes. Prevents climbing insects from reaching foliage, buds and... read more


ThermX™ 70
8714 A wetting agent and spreader-sticker, made from a liquid concentrate of 70% yucca solids. Increases the longevity and effectiveness of pesticide... read more

Seed-Starting Supplies

Seed-Starting Supply
Fabric Pots
8808 Non-woven fabric pots provide excellent support to growing plants while allowing air to flow through the pot walls, preventing root circling and... read more
Seed-Starting Supply
Precise Heat Mats
8838 A good heat mat makes the difference between success and complete failure when starting crops of tropical ancestry, including most Solanums... read more
Seed-Starting Supply
Transplanter Pot
8807 Like our regular Fabric Pots, but with a slit side to allow for easier transplanting without disturbing the root ball. Slit sides overlap so the... read more


Collapsible Drying Rack
9358 36" diameter round shelves of durable polyester in a metal frame. Center strap for improved weight support. Each rack includes 6 tiers that snap... read more


LaMotte pH Test Kitout-of-stock, Clearance
9082 Contains color chart and mixing plate and enough reagent for 100 tests. Compare the color of solution to the chart to determine pH. Indicates pH... read more


Hydroponic Shears
9028 For trimming jobs requiring delicacy and precision. Stainless steel blades extend through the rubber-coated plastic handles, making these shears... read more
Microbrite Plus Pocket Microscope
9002 This ultra-portable user-friendly pocket scope magnifies 60–120x, with a powerful LED light to deliver a bright clear image. Essential tool for... read more
World’s Best Trimmers
9027 Chikamasa B500-SLF scissors are designed to accomplish lengthy delicate trimming jobs ergonomically and efficiently.

Razor-sharp 1.38" stainless

... read more


Angelo 16 Lt Pressure Sprayerclearance
9225 The Angelo was our last-ditch attempt at offering a backpack sprayer for under $100, before we decided that value trumped thrift and switched to... read more
SOLO® 420 2-L Hand Sprayer
9223 Reliable Solo quality for the home gardener, or for use in the greenhouse or grow room. Polyethylene tank has a 2-liter capacity. Piston pump with... read more
SOLO® Backpack Sprayer
9231 Our efforts to carry a backpack sprayer that retails for under $100 brought us nothing but grief in the form of quality complaints. So we sought... read more


Soil Thermometer
9088 Bi-metal spring with 1⅝" needle dial on a 5" stainless steel probe for monitoring soil temperatures at planting depth. Gauge the optimum time for... read more