Planters Pride RZG0020 20 Grow Pellets Greenhouse Kit The kit includes a watering tray, professional humidity dome, 20 Fiber Grow pellets and instructions Fiber Grow Pellets expand up to 10 times faster than the leading peat pellet Pellets are dried and compressed in a biodegradable fine mesh netting; the competitors peat pellets are in a nylon mesh that does not biodegrade Once seedlings have matured both pellet and seedling can be planted directly into a planter or the ground 100% biodegradable