Our windowsill tray with a lid is perfect for propagating seeds and rooting plant cuttings. The shatterproof lid helps to regulate temperature by keeping the heat in for delicate seedlings, giving them a good head start! Complete with five insert trays, each with six-celled growing units, there's plenty of room for all your seeds and cuttings. The insert trays come with integral drainage holes and fit snugly into the strong, durable bottom tray.