Fertoz Organic Granulated Rock Phosphate Fertilizer

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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. Apply with Sulfur or Hum-Amend Max to improve solubility.

Adequate phosphorus results in more vigorous early root formation, better flower and seed production, better growth in cold temperatures, and better water use efficiency. Typical deficiency symptoms are stunted growth, blue-green to purple coloration of the leaves, delayed maturity, and reduced production of flowers and seeds.

This product is a better value than Calphos, which we carried for years: the price per ton is just slightly higher but Fertoz products offer twice the level of soluble Phosphorus. It is best to apply phosphate according to a soil test; if you have not tested your soil but have reason to believe phosphorus is low, a suggested spreading rate could be 50#/1000 sq ft.

Caution to certified organic growers: the arsenic level of this product exceeds 20 ppm; application to certified organic farms must not contribute to contamination of crops, soil, or water.

No New Hampshire Sales.
ships year-round

8250 Fertoz Organic Granulated Rock Phosphate Fertilizer

A: 5.0 lb
MOFGA Approved
$12.50
B: 50.0 lb
OMRI Certificate
$59.00
C:  pallet 40 bags
OMRI Certificate
$1890.00
$2100.00
low stock
Shipping

Items shipping from our growing supplies warehouse take 2-4 business days to process.

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 soil 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: Approved for use by Maine Organic Farmers & Gardeners Association Certification Services. 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.