There?s no need for cumbersome seed trays to be left balancing on your windowsill. This clever windowsill greenhouse kit is just the right size for growing your own flowers and vegetable seedlings indoors. Each set is supplied as two coir 12 cell trays (24 cells in total), a plastic drip tray for catching irrigation water, and a clear plastic lid to keep your seedlings snug and warm. The individual cells are perfect for rooting cuttings or sowing larger seeds such as pumpkins, tomatoes, sunflowers, calendula, marigolds and so many more!