Seedling Tray 99 Cavity is a great way to start your plants from seed. The tray has 99 cavities for planting seedlings and is made from high-quality, durable materials. It is suitable for indoor or outdoor use and can be used for a wide range of plants. 99 cavities for planting seedlings Made from high-quality, durable materials Suitable for indoor or outdoor use Can be used for a wide range of plants Alternative keywords: Seedling tray, Propagation tray, Seedling container, Seed starting tray.