You are viewing all Organic Growers Supply products related to “Fertilizers.”
If you’re tired of ineffectively mixing fertilizers or potting soil ingredients together in a wheelbarrow or tractor bucket, let us do the dirty...
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Join the carbon-farming revolution. Biochar is the product of heating organic matter in a low-oxygen environment: instead of releasing the carbon...
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Don’t guess—test! Applying fertilizers and soil amendments without the guidance of a professional soil test is like driving downtown with your...
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(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...
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(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...
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(Approximately 4-4-0, approximately 18% Ca). A nutrient-rich byproduct of crab processing facilities. As well as being an excellent source of...
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(13-0-0) One of the fastest release times of all organic nitrogen sources. Highly recommended for corn. The smell (understandably) freaks out
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(Approx. 13-0-0) Provides a strong and quick release of nitrogen, about as fast as Blood Meal.
Apply in the row at planting time for sweet corn,
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(2-5-1). Some stock remains with an NPK of 2-5-0.2. Fish heads, bones, skin and guts finely ground and then enzymatically digested. Produced using...
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(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
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(5-4-3 with 9% Ca) From Kreher Enterprises. Composted, pasteurized and processed poultry litter from New York farms provides a good balance of...
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(Sodium Tetraborate, 20.5% B) Soluble borate for fluid fertilizers and nutrient sprays. Boron is essential for all stages of tree growth and fruit...
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(0-0-52) The most economical source of available potassium. Moderate to fast-release. If your soil has sufficient magnesium, this is the potassium...
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(33% CaCO3) When the price of aragonite spiked a few years ago, we tried to steer growers toward the chemically identical Calcitic Limestone, but...
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(0-0-0.2, 1.8% Ca) Named for its A-to-Z of Minerals including Trace Elements; contains over 67 minerals beneficial to plants and animals.
A mix of
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(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
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(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...
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(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...
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(0-7-0, 20% total Phosphate, plus at least 30% Ca and 10% SiO2. Natural phosphorus source from mines in British Columbia, Montana, and Mexico....
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Contains about 5% potassium in very slow-release form. Plants need potassium for sugar and starch production. Granite meal can be added to the...
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(Calcium Sulfate CaSO4•2H2O, 21% Ca, 16% S) Gypsum is a good source of calcium when the pH is already at a desired level. The sulfur in gypsum...
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Max out your soil health! This is a powerful soil restoration amendment designed to raise your soil’s cation exchange capacity while adding high...
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(10.8% Mg, 22% S) Langbeinite is a marine deposit of potassium sulfate and magnesium sulfate in soluble form. A good source of immediate potassium...
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Manganese helps plants to synthesize chlorophyll and is used in electron transport during photosynthesis. Manganese availability may be limited by...
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Calcium helps strengthen plants’ cell walls, improving crop quality, disease resistance and storage capacity. Calcium uptake may be reduced by...
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Copper is necessary for efficient photosynthesis and respiration and affects the sugar content and flavor of produce. Copper availability may be...
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Iron is essential for chlorophyll development and function, and is also involved in nitrogen fixation by legumes. Iron availability may be limited...
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Zinc is a component of auxin, an essential growth hormone, and is also necessary for proper root development. Adequate zinc improves cold...
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(9.8% water-soluble Mg, 12.9% S) Magnesium is a building block of chlorophyll and therefore essential to efficient photosynthesis. In...
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(0-3-0, 21-25% total P2O5) 40% CaO. The consistency of rich soil. Comes from the washing piles left behind when high-grade ore was extracted to...
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Pro-Select Prill (87% CaCO3, 7% MgCO3). Cal Carb Equivalent 95.8%. The most common and most frequently used soil conditioner. Calcitic is the...
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Pelleted Dolomitic Limestone (57.7% CaCO3, 33% MgCO3). Cal Carb Equivalent 96.9%. The least expensive liming agent. Use to sweeten soil (raise pH)...
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Agricultural Sulfur. 90% elemental sulfur, 10% bentonite clay. Use to lower soil pH (make it more acidic). Often helpful for both lowbush and...
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(48% CaO and 52% SiO2). Cal Carb Equivalent 76.0%. Soluble-grade and at least 95% pure (may contain trace amounts of iron, manganese and...
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Zeolites are aluminosilicate lattices, derived from volcanic ash, that hold up to 55% of their weight in water in the small cavities of their...
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(4.6-0.9-1.3 avg) We’ve lost count of how many hemp and cannabis growers have asked us about carrying karanja cake. Your wish is our command! Made...
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(6-1-3 avg) Pure full-strength neem cake—the residue of neem seed kernels after the oil has been pressed. Rich in the basic nutrients, nitrogen,...
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(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...
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Plants and beneficial microbes have a sweet tooth, too! In addition to its sugar content, molasses is a source of important nutrients, including...
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(NPK: 0-0-4) New formula is twice as concentrated as the liquid kelp we carried for years: higher price, but you need only half as much!...
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Kelp Meal for feeding to livestock or amending soil.
Livestock: Kelp is an excellent source of iodine and vitamin A and provides lower
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NPK: 0-0-18. Highly concentrated extract makes an excellent foliar spray containing growth hormones, trace minerals, enzymes and carbohydrates.
One
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(7-1.5-1 avg.) High levels of nitrogen and potassium are released as the soybean meal breaks down, providing fertility over time. Add when first...
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(approx. 3-3.5-3.5, plus sulfur) By popular demand, we designed a special Fedco mix to meet the nutrient requirements of garlic. 3G is about the...
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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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Whether they be abandoned heirlooms or wild seedlings, tucked in the woods or growing alongside an old road, apple trees live on for hundreds of...
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A blend of Granite Meal, K-Mag, sulfur, Tennessee brown rock, Penobscot Blend Compost & Peat, and Azomite. Brings down the soil pH and provides...
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A high-octane well-balanced blend to fuel your grow! This fertilizer and amendment mix includes all the goodies contained in our well-loved ...
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To prepare your land in fall or winter for spring fruit-tree planting, use this mix. Without digging a hole, spread one bag on an area 4–6' in...
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(3-2-3) Slow-release plant food made with blood meal, bone meal, feather meal, peanut meal, alfalfa meal, aragonite, sulfate of potash, greensand...
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(2-5-7) Named for the legendary dwarf-fashioned spear wielded by the Norse god Odin, our new house mix will help you grow mighty spears of...
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Recommended for fruit trees at planting time. Formerly known as Fruit Tree Planting Mix. Our own well-balanced blend of Tennessee brown phosphate,...
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The last of the root vegetables have been tucked into the cellar, and the soil microbes snooze contentedly under a blanket of young winter rye....
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(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...
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(Approx. 7-2-9, plus 2% Ca and 3.5% S) Magic Molly, our potato superhero, is the fastest girl in town: her jacked-up hybrid hatchback runs on our...
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(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...
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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...
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Extra Rich Soil Conditioner for Flower & Vegetable Gardens. Blend of compost, peat, aged bark and crab meal. Rich in micronutrients. Ideal for...
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This top-quality compost, made in Sidney, Maine, comes highly recommended by farm advisor Mark Fulford. The lab results we saw showed strong...
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So many customers ask what to use for filling their raised beds or large containers, and we finally have an answer. Crafted by the soil experts at...
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Blended from manure compost, sphagnum peat moss, granite, basalt, coir, vermiculite, blood and bone meals, kelp and gypsum.
A great boost for
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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...
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(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...
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