coco fiber brick

Many listings advertise coco coir as pH-balanced and having low electrical conductivity (low EC). Several products are labeled “100% organic” or “organic coconut husk.” Claims and terminology vary by brand, so check the specific product label for exact pH/EC values and any organic certification.

"Heat-treated" indicates the coir has been heated to remove pests or harmful organisms. "Washed" (or "fully washed") means the coir has been rinsed—sometimes multiple times—to lower salts and EC. Labeling practices vary, so review the product description for specifics.

A 10 lb coco coir brick is described as expanding to about 18 gallons of potting mix, which is roughly 2.6 cubic feet.

For small bricks, pour warm water over the brick and allow it to absorb. The listings suggest letting it sit about 30–40 minutes, then break the softened coir apart by hand to finish hydrating and fluff it for use.

Descriptions vary: one listing calls the coir "nutrient-rich," while another notes that coco coir has low natural nutrient content and advises pairing it with nutrient-rich soil. Because labels differ by product, consult the specific listing to see whether additional fertilizing or mixing with nutrient-rich media is recommended.