You are viewing all Organic Growers Supply products related to “Compost.”

Custom Mixing
Amendments and Fertilizers

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. read more

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Raw Biochar
Amendments and Fertilizers

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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Soil Testing & Organic Fertilizer Recommendation Service
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 read more

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Superworm Frass
Amendments and Fertilizers

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
Amendments and Fertilizers

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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Blood Meal
Animal-based - Amendments and Fertilizers

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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Fish Bone Meal
Animal-based - Amendments and Fertilizers

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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Poultry Manure Compost
Animal-based - Amendments and Fertilizers

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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Pro Pelleted Calcitic Limestone
Mineral - Amendments and Fertilizers

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
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. read more

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Alfalfa Meal - Organic
Plant-based - Amendments and Fertilizers

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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Soybean Meal
Plant-based - Amendments and Fertilizers

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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3G Greener Garlic Grower
Planting Mix - Amendments and Fertilizers

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
Planting Mix - Amendments and Fertilizers

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... read more

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Fall Fruit Tree Prep Mix
Planting Mix - Amendments and Fertilizers

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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Sleepytime Garden Blend
Planting Mix - Amendments and Fertilizers

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! read more

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Vegemighty
Planting Mix - Amendments and Fertilizers

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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Bio365 BIOALL™
Compost and Potting Soil

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. read more

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CannaLot
Compost and Potting Soil

Use this complete soil mix in Fabric Pots to take your cannabis plants from 12" to harvest. Contains a wide variety of organic fertilizers, including biochar to support microbial activity. read more

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Coast of Maine Penobscot Blend™ Organic & Natural Planting Mix
Compost and Potting Soil

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
Compost and Potting Soil

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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Coir Blocks
Compost and Potting Soil

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. read more

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GreenTree Ag Blend™
Compost and Potting Soil

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. read more

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Living Acres NP Germination Blend™
Compost and Potting Soil

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. read more

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Peat-free Turbo Seed Starter
Compost and Potting Soil

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,... read more

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Perlite
Compost and Potting Soil

A lightweight, porous and stable material made from volcanic glass. Widely used in potting mixes to improve water retention and prevent compaction. Also great for rooting cuttings. read more

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Rainbow Valley Compost
Compost and Potting Soil

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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Rice Hulls
Compost and Potting Soil

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. read more

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Vermont Compost Fort Light™ Potting Soil
Compost and Potting Soil

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. read more

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Vermont Compost Fort Vee™ Potting Soil
Compost and Potting Soil

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. read more

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Vermont Compost Jolly Roger™
Compost and Potting Soil

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. read more

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Vermont Compost Perennial Blend™
Compost and Potting Soil

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. read more

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Vermont Compost Plus®
Compost and Potting Soil

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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Vermont Compost Totes
Compost and Potting Soil

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. read more

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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... read more

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