Pre loaded Super Sprouter Perfect Plug Trays® are great for seed starting and cuttings. Perfect Plug uses a custom peat moss blend exclusively developed for Super Sprouter to allow a great mixture of moisture and aeration. Perfect Plugs have a pre drilled hole to foster the optimum environment for stem to media contact. Tray, insert and plugs are all included to make your cutting or seeding experience easy. Easy to use, just insert cutting or seeds into your plugs and watch them grow.