Description Burpee Super Growing Pellets are ideal for seed starting and rooting cuttings Our unique coconut coir is specially formulated to get your seeds off to the Best start possible Holds more water with better air circulation than ordinary peat pellets Refill for Burpee 32-cell XL self watering and eco friendly seed starting Kits Pellets expand to Approximate 2.25″ x 2.25″ and 2″ tall