Calphos Soft Rock Phosphate (25 lb bag)

$14.99

The 25 lb Calphos Soft Rock Phosphate bag bridges the gap between a small garden package and the 50 lb farm-size bag. It is well suited to multiple vegetable beds, perennial plantings, small orchards, and other projects that require more coverage without committing to the largest package.Product profileCalphos is a finely ground mineral amendment that averages about 20% P₂O₅, including 3% available phosphate, and approximately 18% calcium. It releases phosphorus gradually, so it is most useful when incorporated into soil where roots can reach it. Apply it to correct a demonstrated need rather than as a routine addition to soil that already contains sufficient phosphorus.Application guidance For phosphorus-deficient soil, the general published rate is 5 lb per 100 sq ft; use less in more fertile soil. Published planting-hole guidance for trees and perennials ranges from 1–10 lb, depending on plant size. Use a current soil test and local recommendations to refine the rate for your crop and soil. Organic status: This repackaged 25 lb size is not represented as organic or as listed or approved for certified organic production. The 50 lb original package carries its own organic-use listing; that status does not transfer to this repackaged size.See our soft rock phosphate guide for additional planning information.Compare this product with additional nutrient-specific fertilizers selected for garden and farm fertility programs.

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