You are viewing all Organic Growers Supply products related to “Compost.”
Tired of ineffectively mixing fertilizers or potting soil ingredients together in a wheelbarrow or tractor bucket? Let us do the dirty work for you! Buy ingredients from us or bring your own.
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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.
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Soil Testing & Organic Fertilizer Recommendation Service
out-of-stock, Unavailable for 2024
Amendments and Fertilizers
out-of-stock, Unavailable for 2024
Don’t guess—test! You’ll learn your soil pH, organic matter percentage, levels of common minerals and nutrients, plus we’ll offer customized recommendations to correct or improve your soil
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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.
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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.
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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.
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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.
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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.
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The most common and most frequently used soil conditioner. also called Hi-Cal lime. Recommended for soils with excess magnesium.
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Pro Pelleted Limestone, Dolomitic Limestone Pro-Select Prill
currently on backorder
Mineral -
Amendments and Fertilizers
currently on backorder
The least expensive liming agent. Use to sweeten soil (raise pH) and provide calcium where excess magnesium is not a problem.
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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.
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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.
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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.
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Just as 5G ushered in a new telecom era, our 5G kit will revolutionize your garden’s garlic game. You’ll be effortlessly broadcasting and...
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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.
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Spread this 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!
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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.
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A premium high-test potting soil recommended for indoor growers, container gardening, soil-blocking, or slow-growing seedlings that will be in the greenhouse for six weeks or more. Made in New York.
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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.
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Soil conditioner for flower & vegetable gardens. Blend of compost, peat, aged bark and crab meal. Rich in micronutrients. Ideal for flower and vegetable beds.
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An environmentally sound substitute for peat moss. Use in potting mixes or to add organic matter to your soil. Improves aeration, nutrient retention, and moisture-retention capacity.
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All-purpose blend, light on the peat, with coconut coir, worm castings and a well-balanced organic nutrient package. Suitable for seed starting, transplants and microgreens; Made in New York.
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A light-textured potting soil with extra perlite, screened to ½". Recommended for the smallest flower and herb seeds. Transplant to a more nutrient-rich blend to grow out. Made in Maine.
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Peat-free is the way to be! This professionally calibrated mix will give any peat-based potting mix a run for its money. In a head-to-head trial,...
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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.
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A great alternative to perlite in your growing medium—carbonaceous, renewable and less dusty to mix. Also used as a mulch for container plants. Parboiled to eliminate viable weed seeds.
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Recommended for cell-tray seedlings, but not for soil-blocking. Warms more quickly and drains better than Fort Vee, but might need additional fertilizing prior to transplanting.
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Widely used by growers who make soil blocks. Has good water retention and a long-lasting nutrient supply from the high proportion of compost in the mix. Highly recommended for slow-growing seedlings.
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Sick and tired of poor yields from your container-grown cannabis or hemp? Ahoy, matey, this flowering and fruiting mix is for you! Also great for tomatoes and other vegetables, flowers or houseplants.
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Great for filling their raised beds or large containers Coarser than potting mixes, and formulated as a complete soil for organic cultivation of woody plants, shrubs, herbs, vegetables and flowers.
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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.
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For the times when those little bags just won't cut it, Vermont Compost blends are available in 2 cubic yard totes, perfect for larger gardens and growing operations. Choose from a variety of blends.
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Interested in growing your own seedlings but don’t know where to start? This kit is for you! Contains top-notch potting soil, a range of cell...
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