Coastal Oyster Shell Flour – High-Calcium Natural Soil Amendment LEED compliant Please note: Not available for

Please note: Not available for shipping to California

With Microbe Manna Wildlife Maxx Dry prebiotic

Designed for comfortable

Outdoor nursery plants

compost tea

Coastal Oyster Shell Flour – High-Calcium Natural Soil Amendment LEED compliant Please note: Not available forCoastal Oyster Shell Flour is an all natural, micronized source of coarse to fine calcium carbonate (CaCO) specifically processed for living soil, commercial crop production, and organic farm management. Sourced from high purity, ocean derived oyster shells, this premium soil builder delivers a sustained, multi season release of plant available calcium while gently raising and buffering soil pH over time. Unlike standard agricultural lime, Oyster