Using the fibrous byproduct of the industrial hemp plant, Terrafibre™ grow mats are ideal for microgreens, sprouts, wheatgrass and other short rotation crops. Industrial hemp fibers are separated, cleaned and needle punched to produce a 100% biodegradable soilless growing medium. Hemp fibers have high water retention, keeping seeds wet through germination. 100% biodegradable and compostable - all natural and pH neutral, just Sprinkle seeds to the desired density, then mist. All of the hemp used is grown, processed, and manufactured in Canada.