Super Sprouter? Perfect Plug Tray? pre-loaded starter trays are great for seed starting and cuttings. Perfect Plug brand growing media plugs use a custom peat moss blend, with Mother Earth? BioChar added, exclusively developed for Super Sprouter? to allow a great mixture of moisture and aeration. Perfect Plug media 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.