A wise investment for successful seeding. This lightweight, sterile, inert material is suitable as a cover on seed beds and trays. Vermiculite helps maintain a higher humidity for seeds sown shallow on the surface (e.g., begonia, impatiens). Prevent seeds from drying out and protect “surface seeding seeds” from the birds. Our recommendation is that most seeds sown will benefit from a light application. Please note this is supplied in a cardboard shaker tube.