Jump Start JS36GH 36-Cell Greenhouse with 36 Fast-Expanding Biodegradable Peat Pellets and Reusable Vented Dome The Jump Start 36 Cell Greenhouse includes 36 biodegradable grow pellets The included adjustable vented dome maintains humidity and warmth, making it the ideal environment for fragile new growth Once your seedlings have established roots, transplant them and start over with refill pellets and new seeds or cuttings. (Reorder Jumpstart JS36PR-36pack Refill) This greenhouse starter kit is ideal for seed starting Start a vegetable or herb garden right on your windowsill or anywhere else that is convenient in this reusable waterproof tray