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. The 5" squares are great for live clamshell sales of microgreens. All of the hemp used is grown, processed, and manufactured in Canada.