Organic Growers Supply: Rock Powders

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.

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Blueberry Booster

A blend of granite meal, sulfur, Tennessee brown rock phosphate, compost and Azomite. Reduces soil pH and provides the nutrients necessary for healthy blueberry plants and good fruit.

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Fall Fruit Tree Prep Mix

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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Fruition Mix

Hole-Istic Spring Planting Mix

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!

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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.

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Sleepytime Soil Builder

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!

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Vegemighty

20 Mule Team Borax Solubor® DF

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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AZOMITE®, Granulated Natural Trace Minerals

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.

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

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BrixBlend Basalt

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

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Granite Meal

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.

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Hum-Amend Max

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.

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Monterey Epsom Salts

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

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ZeoMax Garden Aid

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.

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Aragonite

Pro Pelleted Calcitic Limestone

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.

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Pro Pelleted Dolomitic Limestone

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

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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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Pro Pelleted Gypsum

Tiger Organic 90CR Sulfur

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

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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.

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Wollastonite