The Garden Basics 35cm Seedling Tray has been constructed from rigid black plastic with fine hole base making this seedling tray is perfect for sowing small seeds prior to transplanting into larger containers. Perfect for use growing wheatgrass or sprouting barley grass. Also useful for using as a base for punnets. The raised, perforated base encourages healthy air flow, ensuring that seedlings grow healthy root systems, reducing the risk of root rot.