Greensand

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Greensand

(49.3% SiO2, 3.72% Fe) “Greensand has been successfully used for soilbuilding for more than 100 years,” according to Rodale’s Encyclopedia of Organic Gardening. Also known as glauconite, this material is about 50% silicon dioxide and 1.2% potassium with the balance composed of a broad array of trace elements. Loosens clay soils and improves sandy soils. Nearly 4% iron: a good rooting iron for winter piglets to prevent anemia.

We used to get greensand from New Jersey; that source dried up, causing a mild panic among greensand aficionados across the nation. We scoured the globe until we found some in Russia. Russian greensand is less green in color than Jersey greensand; some folks are happy with it and others not.

Apply at 500–2000#/acre or 10–50#/1000 sq ft. MOFGA



8234 Greensand
Item Discounted
Price
A: (5#) $5.25
  MOFGA Approved
out-of-stock, clearance
B: (50#) $42.50
  MOFGA Approved
out-of-stock, clearance
C: pallet 40 bags (2000#) $1120.00
  MOFGA Approved
($952.00)
out-of-stock, clearance
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Additional Information

Soil Amendments and Fertilizers

Thriving sustainable agriculture is built on the ground of a healthy soil. In fact, organic certification requires a soil management plan. Do a soil test to determine your soil’s needs before embarking on a program of soil improvement. Check with your local Cooperative Extension for testing in your area, or consider our testing and recommendation service.

Soil amendments used with a program of crop rotation, composting and cover cropping can enhance fertility, improve soil tilth, promote disease resistance, support beneficial soil microorganisms, and even help restore balance to the garden and the world around it. Application rates vary depending on soil type and results of soil tests.

Fertilizers provide nitrogen and other nutrients in a form that is readily available to plants. Organic fertilizers can provide both an immediate boost and additional long-term fertility, feeding both the plants and the organisms that maintain soil health. We also offer soil amendments that have limited available plant nutrients but help to remineralize the soil, improve soil structure, or provide a long-term slow-release source of plant nutrients. Foliar sprays get nutrients directly to the leaves and can increase resistance to disease and to insect infestation.

Analyses provided here are those provided by the manufacturers, or, if none are available, from a Maine state lab test performed on our most recent lot: there is some variability in the nutritional analysis of natural fertilizers, so view these numbers as guides, not gospel. Fertilizers should be used as a supplement to, not a replacement for, the nutrients provided by healthy soil. Sustainability requires developing a long-term plan of cover-cropping, green manuring and composting.

Organic Certification

Inoculants, soil amendments, fertilizers, livestock supplies and pesticides are labeled as:
OMRI: Organic Materials Review Institute. Most state certifying agencies, including MOFGA, accept OMRI approval.
MOFGA: Reviewed and approved by the Maine Organic Farmers & Gardeners Association Certification Services. Allowed for use on MOFGA-certified farms. Check with your certifier.
WSDA: Listed by the Washington State Department of Agriculture’s Organic Certification division for use in organic agriculture in Washington State. MOFGA has indicated that they will accept products on this list for their certification program. Check with your certifier.
Nat’l List: One-ingredient products on the NOP* List of Allowed Substances (subpart G of the Organic Foods Production Act, sections 205.601-606). Check with your certifier.
AYC: Ask your certifier. Has not been reviewed by a certifier, but the active ingredient is allowed. Ask your certifier.
Not Allowed: A few of the products we list are not allowed for organic production but we think they have a place in sensible agriculture and can be used when certification is not an issue.

Click here for our list of soil amendments, fertilizers, and disease and insect controls along with their certification status and manufacturers.