Jiffy Seed Starting Greenhouse with 72 Biodegradable 36mm Peat Pellets and Bonus SUPERthrive Sample + Plant Markers (T72HST14) Startup to 72 plants in the Jiffy 425 pellet professional greenhouse. 72 cells & 36mm pellets is a perfect way for starting your garden indoors. As a bonus, get your seedlings started off strong with a sample of super thrive, a Kelp-Based vitamin for plants! Features Convenient way to start seedsIncludes water-tight tray and clear domeMaintains humidity and warmth during germination periodNo assembly required USA SHIPPING eBay estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.