Ferry-Morse 11" x 22" Plastic Insert Seed Tray. It contains 36 cells that are pre-filled with sphagnum peat moss, horticultural grade vermiculite, perlite, plus starter fertilizer with a wetting agent. This lightweight seed starting soil is prefilled in quick-draining recycled plastic cells to help grow 36 seedlings. Great for beginners, just add seeds! Reusable deep cell inserts made from recycled plastic encourage root growth and stronger seedlings. Perfect for flowers, vegetables, and herbs. Scan the QR code on the package to watch tutorials, get tips, and view products.