Fertilizers - Supplies

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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 Penobscot Blend™ Organic & Natural Planting Mix

Compost

out-of-stock

75% composted salmon, oyster-shell fragments, and wild blueberries with 25% sphagnum peat. Perfect for mulching trees and shrubs, or topdressing lawns. Adds nutrients and structure to planting mixes. read more

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Coast of Maine Quoddy Blend™ Organic Lobster Compost

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

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Rainbow Valley Compost

currently on backorder, ETA 4/25

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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Vermont Compost Plus®

A great boost for transplants, potted plants and garden soils. Improves soil structure, provides a generous dose of slowly released nutrients and enhances microbial activity. read more

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3G Greener Garlic Grower

Fertilizer Blend

NPK: 3-3.5-3.5 avg. plus sulfur. With 3G Greener Garlic Grower, you can expect better spring emergence, more vigorous plants, bigger bulbs and richer flavor. Blended in-house. read more

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5G Grow Great Garlic Greener, Guaranteed Kit

Fertilizer Blend

Kit includes user-friendly instructions and supplies for up to 100 cloves (about 2 lb) of seed garlic! read more

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Ancients Rise Mix

Fertilizer Blend

currently on backorder

Formulated to build humus, enhance CEC, and condition the soil in which the ancient roots reside, whether they be abandoned heirlooms or wild seedlings. Can be applied in fall or spring. read more

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Blueberry Booster

Fertilizer Blend

currently on backorder

A blend of granite meal, K-Mag, sulfur, Tennessee brown rock, compost, peat, and Azomite. Brings down the soil pH and provides the nutrients necessary for healthy blueberry plants and good fruit. 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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Fall Fruit Tree Prep Mix

Fertilizer Blend

For a deluxe tree planting spot, choose this mix! Contains a broad spectrum of macro and micronutrients and soil conditioners that fruit trees thrive on. Follow our directions for use in the fall. read more

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Fruition Mix

Fertilizer Blend

currently on backorder

A balanced fertilizer to keep your bearing fruit trees healthy and productive. If your tree put on 4" or less of terminal growth last year, our Fruition Mix will put new spring in its step! read more

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Gungnir Asparagus Mix

Fertilizer Blend

NPK: 2-5-7. Our new house mix will help you grow mighty spears of asparagus. Formulated to meet Penn State Extension’s recommendations for the annual fertilization of asparagus beds. read more

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Hole-Istic Spring Planting Mix

Fertilizer Blend

Recommended for fruit trees at planting time. Our own well-balanced blend of Tennessee brown phosphate, alfalfa meal, Azomite, and K-Mag in a humus-rich base of worm castings. read more

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NutriVeg®

Fertilizer Blend

NPK: 5-4-4. 5% Ca. A blend of fertilizers and minerals to provide balanced nutrition for veggies, trees and shrubs. Made in Maine. read more

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RhiZoom Ginger & Turmeric Mix

Fertilizer Blend

(NPK: 6-2.5-10.4, with 7.7% Calcium, 3.5% Sulfur, and 8.3% Silicon Dioxide) Growing ginger and turmeric in cold climates is a heroic task, but... read more

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Sleepytime Garden Blend

Fertilizer Blend

Spread this blend of granite, zeolites, gypsum, micronutrients and humates in that fall, and it will improve soil structure, remineralize, and enhance nutrient availability for the next spring! read more

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Tomato Sauce

Fertilizer Blend

NPK: 3-4-6.1 By popular demand! A Fedco Blend formulated to meet the needs of field-grown (outdoor) fruiting Solanaceous crops: tomatoes, peppers, eggplants and tomatillos. read more

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True Love Rose & Ornamental Mix

Fertilizer Blend

NPK: 2.5-6-3. Show your flowers you appreciate them by treating them to dinner now and then. This mix is formulated to feed both soil and plant to encourage healthy foliage and lush, colorful blooms. read more

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Turbo-Tuber

Fertilizer Blend

NPK: 7-2-9 avg. 2% Ca and 3.5% S. High-test organic fertilizer, formulated to meet the nutrient requirements of potatoes. Blended in-house. 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 (Drammatic "O" Liquid Fish Plant Food)

Liquid Fertilizers

NPK: 2-5-0.2. Fish heads, bones, skin and guts finely ground and then enzymatically digested. Can be used as foliar feed. Made from wild fish scraps from the fishing industry along the Great Lakes. 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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Micronutrients Liquid Calcium

Liquid Fertilizers

Calcium helps strengthen plants’ cell walls, improving crop quality, disease resistance and storage capacity. Can help prevent problems like blossom end rot and bitter pit. read more

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Micronutrients Liquid Copper

Liquid Fertilizers

Copper is necessary for efficient photosynthesis and respiration and affects the sugar content and flavor of produce. Contains 4% chelated copper derived from copper sulfate. read more

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Micronutrients Liquid Iron

Liquid Fertilizers

Iron is essential for chlorophyll development and function, and is also involved in nitrogen fixation by legumes. Contains 5% chelated iron derived from ferrous sulfate. read more

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Micronutrients Liquid Manganese

Liquid Fertilizers

Manganese helps plants to synthesize chlorophyll and is used in electron transport during photosynthesis. Contains 1% nitrogen from vegetable protein and 5% chelated manganese. read more

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Micronutrients Liquid Zinc

Liquid Fertilizers

Zinc is a component of auxin, an essential growth hormone, and is also necessary for proper root development. Improves cold tolerance. Contains 7% zinc derived from zinc sulfate. 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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20 Mule Team Borax Solubor® DF

Mineral

Soluble borate for fluid fertilizers and nutrient sprays. Boron is essential for all stages of tree growth and fruit set. Powder mixes easily in any spray solution. read more

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AZOMITE®, Field Grade Natural Trace Minerals

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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Hum-Amend Max

Mineral

A powerful soil restoration amendment! Supports plant health and increases yields by facilitating roots’ uptake of plant nutrients and water. Improves levels of carbon and humus. 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

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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ZeoMax Garden Aid

Mineral

Zeolites can improve the productivity of any texture of soil, improving water and mineral retention in sandy soils and improving aeration and minimizing compaction in heavier soils. 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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Tiger Organic 90CR Sulfur

pH and Calcium

Agricultural Sulfur. Use to make soil pH more acidic. Often helpful for both lowbush and highbush blueberries, and for potatoes. Lowering the pH of gravel paths will help control weed growth. read more

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Wollastonite

pH and Calcium

Silicon is linked to improved yields, especially recommended for cannabis, orchard crops, cucurbits, sweet corn, grains and forage crops. Also helps build resistance to powdery mildew. 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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Feather Meal

Single Ingredient Nitrogen

NPK: 13-0-0(apx). Provides a strong and quick release of nitrogen. Apply in the row at planting time for sweet corn, melons, brassicas and other heavy feeders. Not water-soluble. 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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Poultry Manure Compost

Single Ingredient Nitrogen

NPK: 5-4-3 (with 9% Ca). Composted and processed poultry litter provides a good balance of major plant nutrients and other essential elements. Pasteurized to neutralize weed seeds and pathogens. 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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Fish Bone Meal

Single Ingredient Phosphorus

NPK: 6.9-11.9-0.8 avg. Excellent source of nitrogen and phosphorus. Use as a sidedressing or mix into compost to provide added nitrogen and a bacterial boost. A byproduct of wild-caught fish. 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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K-Mag Granular Trio 0-0-22

Single Ingredient Potassium

A good source of immediate potassium for depleted soil and of magnesium where calcium is abundant. Alliums like its sulfur and potatoes like its quick boost of potassium. 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

Organic Growers Supply: Fertilizers