Our exclusive coir seed starting mix is an effective, economical and earth-friendly medium for starting seeds. Derived from recycled coconut husks, Eco-co Coir passed our extensive seed-starting trials with flying colors, providing excellent germination rates and producing healthy, sturdy seedlings. Unlike other coir products, our Eco-co Coir undergoes a special process to remove salts and to balance the pH for optimal plant growth. Then it's finely ground to provide the perfect environment for seedling roots. Eco-co Coir has excellent water-holding capacity yet drains well — so important for healthy root growth. Simply add water and each convenient compressed brick expands to 10 quarts of fluffy planting mix.