Contains fifty 1-3/4" square cells in 1 Jiffy-Strip, 11" x 22" reusable tray and dome made from recyclable plastic. The transparent dome maintains greenhouse humidity and temperature for healthier seedlings. 100% biodegradable, the peat pot strip, made with Canadian sphagnum peat moss and wood pulp, provides a high-quality, rich growing environment and can be planted directly in the ground or in larger containers to minimize transplant shock. For use with all Jiffy planting mixes.