Cannabis Growing Supplies - Supplies & Seeds

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Biochar helps your soil sequester more carbon and emit less nitrous oxide. Also provides a dream home for beneficial bacteria and fungi, while preventing essential nutrients from leaching away. read more

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Coast of Maine Quoddy Blend™ Compost with Lobster & Crab

Soil conditioner for flower & vegetable gardens. Blend of compost, peat, aged bark, lobster and crab meal. Rich in micronutrients. Ideal for flower and vegetable beds. read more

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Rainbow Valley Compost

This top-quality compost has strong nitrogen levels and sky-high organic matter. Use as a top-dressing, mix into garden soil, or apply around the trees. Made in Sidney, Maine. read more

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CannaDiesel Mix

Fertilizer Blend

currently on backorder

This fertilizer and amendment mix includes all the goods contained in our well-loved CannaLot MegaSoil, minus the compost and potting soil. Great for plants grown in the ground, and cheaper to ship! read more

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Vegemighty

Fertilizer Blend

NPK: 3.4-2.2-3.5. An excellent all-purpose fertilizer for those who prefer to avoid animal products. Great for flower bulbs because it won’t attract critters. read more

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Fish Hydrolysate with Kelp (Drammatic "K" Liquid Fish Plant Food)

Liquid Fertilizers

NPK: 2-5-1. All the NPK of fish, along with the micronutrients and growth hormones of kelp. Encourages vigorous rooting. Improves plant vigor and stress resistance, increases storage life of produce. read more

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Fulvic Acid Liquid

Liquid Fertilizers

Fulvic acid is a powerful antioxidant and chelator: one molecule can transport 60 or more minerals into plant cells for a more efficient and effective fertilization program read more

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High Brix Molasses -

Liquid Fertilizers

Molasses is a source of important nutrients, including manganese, magnesium, copper, potassium and calcium. Food grade, shelf stable. Plants and beneficial microbes have a sweet tooth, too! read more

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Humic Acids SP

Liquid Fertilizers

Humic acids perform many complex functions. They neutralize soil pH, prevent leaching of trace minerals, stimulate growth of foliage and roots significantly, and much, much, more! read more

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Kelp Liquid Concentrate

Liquid Fertilizers

New formula is twice as concentrated as the liquid kelp we carried for years, so you'll need only half as much! read more

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Kelp-It Soluble Powder Dehydrated Seaweed Extract

Liquid Fertilizers

NPK: 0-0-18. Highly concentrated extract makes an excellent foliar spray containing growth hormones, trace minerals, enzymes and carbohydrates. read more

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Monster Plant Mojo (Drammatic "ONE" 4-4-0.5 Plant Food)

Liquid Fertilizers

NPK: 4-4-0.5. Contains fish hydrolysate, kelp extract, humic and fulvic acids, and a dash of chilean nitrate to boost the nitrogen levels for rapid vegetative growth. read more

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AZOMITE®, Field Grade Natural Trace Minerals

discontinued, substitute 8213.

Contains over 67 minerals beneficial to plants and animals. A mix or particle sizes. Lots of powder, but still less dusty than Micronized Azomite. read more

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AZOMITE®, Granulated Natural Trace Minerals

Contains over 67 minerals beneficial to plants and animals, including rare earth elements. read more

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BrixBlend Basalt

Mineral

A paramagnetic stone powder for remineralizing and enhancing general foundational soil fertility. read more

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Granite Meal

Mineral

Contains about 5% potassium in very slow-release form. Can be added to the soil in large amounts without altering the pH. Greatly enhances soil structure and promotes healthier plants. read more

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Kelp Meal -

Mineral

For soil: excellent source of naturally chelated elements, enzymes, and amino acids. For livestock: excellent source of iodine, vitamin A and dozens of other vitamins and trace minerals. read more

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Monterey Epsom Salts

Mineral

low stock

Magnesium is a building block of chlorophyll and therefore essential to efficient photosynthesis. May boost yields significantly, especially for roses and tomatoes. read more

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Aragonite

pH and Calcium

From oyster shells, not pulverized rock. Aragonite is even lower than calcitic lime in magnesium, so it's the ideal choice for soils with excessive magnesium. read more

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Gypsum, Pelletized

pH and Calcium

A good source of calcium when the soil pH is already at a desired level. read more

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Pro Pelleted Calcitic Limestone

pH and Calcium

The most common and most frequently used soil conditioner. also called Hi-Cal lime. Recommended for soils with excess magnesium. read more

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Pro Pelleted Limestone, Dolomitic Limestone Pro-Select Prill

pH and Calcium

The least expensive liming agent. Use to sweeten soil (raise pH) and provide calcium where excess magnesium is not a problem. read more

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Ahimsa Organics® Karanja Cake

Single Ingredient Nitrogen

NPK: 4.6-0.9-1.3 avg. A favorite of earthworms and other beneficial soil organisms, and inhibits the growth of some notorious pathogenic soil microbes. Beloved by hemp and cannabis growers. read more

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Ahimsa Organics® Neem Cake

Single Ingredient Nitrogen

NPK: 6-1-3 avg. Rich in the basic nutrients, nitrogen, phosphorus and potassium, it makes an excellent fertilizer and soil additive. Can help suppress fusarium infestations. read more

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Alfalfa Meal -

Single Ingredient Nitrogen

NPK: 2.5-0.4-3.3 avg. Gives plants a noticeable boost and feeds soil organisms. Excellent vegan alternative to blood meal as a nitrogen source. Hands-down the best-smelling fertilizer out there. read more

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Biogreaux Crab Shell 4-4-0 18% Ca

Single Ingredient Nitrogen

NPK: 4-4-0 avg. 18% Ca avg. A macronutrient-rich byproduct of crab processing. Will help you grow massive specimens of field-grown cannabis. Improves lodging resistance and reduces branch breakage. read more

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Blood Meal

Single Ingredient Nitrogen

NPK: 13-0-0. One of the fastest release times of all organic nitrogen sources. Highly recommended for corn. The smell (understandably) freaks out deer. Use as a side-dressing or till into soil. read more

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North Country Organics® Bone Char

Single Ingredient Nitrogen

NPK: 0-16-0. Provides large amounts of readily available phosphorus. A most economical source of P for deficient soils. May be applied without restrictions to organically certified fields. read more

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Soybean Meal

Single Ingredient Nitrogen

NPK: 7-1.5-1 avg. Effective and economical nitrogen fertilizer for Northeast soils. High levels of nitrogen and potassium are released as soybean meal breaks down, providing fertility over time. read more

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Fertoz Organic Granulated Rock Phosphate Fertilizer

Single Ingredient Phosphorus

Natural phosphorus source. Adequate phosphorus results in more vigorous early root formation, better flower and seed production, better growth in cold temperatures, and better water use efficiency. read more

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Phosphate, Tennessee Brown Rock

Single Ingredient Phosphorus

Recommended by soil gurus Phil Callahan and Mark Fulford. Lowest concentration of heavy metals of any phosphate source. Concentrations of available phosphate were regularly over 6% when tested. read more

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Protassium+® Sulfate of Potash 0-0-50

Single Ingredient Potassium

NPK: 0-0-50. The most economical source of available potassium! Fine-grained texture. read more

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Superworm Frass

Worm Castings and Frass

NPK: 2-2-2. 16% Chitin. Nourishes chitin-feeding bacteria and fungi, which in turn devour gnat eggs and root-feeding nematodes. Also fortifies plants’ cell walls, and fosters healthy blooms. read more

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Worm Castings

NPK: 0.5-0.5-0.3 apx, plus trace minerals. Worm castings limit plant disease and have beneficial effects including enhanced mycorrhizal activity and the suppression of parasitic nematodes. read more

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Dr. Higa’s Original™ EM-1 Microbial Inoculant

Beneficial Microbes and Inoculant

A liquid combination of yeasts, actinomycetes, and bacteria. Promotes plant health and growth, and improves nutrient absorption and soil fertility. Our cannabis-growing friends can't do without it. read more

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Mammoth P

Beneficial Microbes and Inoculant

out-of-stock, discontinued by mfg.

Active Microbials Nutrient Liberator. Cannabis growers using Mammoth P see bud yields 16% higher than in untreated plants, as well as stronger plants less susceptible to lodging. read more

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MycoApply Endo/Ecto

Beneficial Microbes and Inoculant

sale 25% off

A granulated blend of 7 beneficial mycorrhizal fungi for mixing into soil. Add to seedbeds or work into the soil around your trees and shrubs to boost root growth, nutrient uptake and soil health. read more

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American Hemp Farmer: Adventures and Misadventures in the Cannabis Trade

Book

sale! was $24.95

A must-read for anyone in the cannabis industry. Covers all aspects from soil and seed, to planting, growing and maintaining, through markets and product diversification. Funny and informative. read more

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The Beginner’s Guide to Growing Cannabis and Making Your Own Healing Remedies

Book

by Tammi Sweet, 144 pages, 7x9, softcover. Practical, clear and wasting not a word, this guide is a perfect tool for anyone new to the world of... read more

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The Complete Guide to Restoring Your Soil

Book

A soil science book for everyone! Filled with farmer anecdotes, insightful reference charts, and illustrations, this book is both engrossing and practical for anyone who works with soil. read more

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The Regenerative Grower’s Guide to Garden Amendments: Using Locally Sourced Materials to Make Mineral and Biological Extracts and Ferments

Book

This book dives deep into the chemical and biological workings of your garden soil! Plenty of in-depth science, but also includes 12 soil amendment recipes simple enough for a layperson to follow. read more

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What’s Wrong with My Marijuana Plant?: A Cannabis Grower’s Visual Guide to Easy Diagnosis and Organic Remedies

Book

sale! was $24.95

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

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The Wholistic Healing Guide to Cannabis: Understanding the Endocannabinoid System, Addressing Specific Ailments and Conditions, Making Cannabis-Based Remedies

Book

sale! was $32.95

by Tammi Sweet, 272 pages, 6x9, softcover. This book has something for both the cannabis-naive and the cannabis-savvy. Whether you want to make a... read more

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11" Fencing/Netting Ties

Crop Support

UV-resistant zip ties designed for securing fencing, netting, and trellises to metal, fiberglass, or wooden posts up to 3" in diameter. Quick and easy to use, will not rust or rot. read more

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Jute Trellis Netting

Crop Support

A netted grid of 6.5 x 6.5" squares can be used vertically or horizontally. Unlike our nylon trellis netting, jute netting does not stretch. Withstands up to three seasons of use. read more

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Nylon Trellis Netting

Crop Support

7" reach-through nylon mesh with a strand strength of 60# for tomatoes, climbing beans, peas, cucumbers and luffas. Will last for many years if you can avoid “the tangles”! read more

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Garden Irrigation Expansion Kit

Irrigation Kit - Drip Irrigation

currently on backorder

This expansion kit can add another 200' of irrigation to your existing setup. Contains 200' of low-flow drip tape, 10 drip-tape fittings, 10 drip-tape ends, and 2 couplers. read more

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Garden Irrigation Starter Kit

Irrigation Kit - Drip Irrigation

currently on backorder

This starter kit gives you everything you need for 200' of garden row-crop irrigation. Includes setup instructions, low-flow drip tape, as well as fittings, ends, couplers and more! read more

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Dutch White Clover

Farm Seed

Perennial legume. The lowest-growing clover. This shade- and traffic-tolerant perennial makes nice garden paths and living mulch. Our most popular clover. read more

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Magic Carpet Mix

Mixes - Farm Seed

Diverse multispecies clover-heavy mix is great as a soil-building living mulch under tall-growing competitive crops, like cannabis. Suitable in raised beds, containers and high tunnels. read more

Organic Growers Supply: Cannabis Growing Supplies