36mm Jiffy 7 Peat Pellets are a consistent seed starting medium that is optimized for propagation and root development. Jiffy Pellets are the convenient, no-mess way to start flower and vegetable seeds and cuttings. Just add water – pellets expand to form pot and soil in one. Transplant directly into the ground or larger containers minimizing transplant shock and root damage. Jiffy-7 Pellets are manufactured from sphagnum peat (and Coir fibers) harvested from carefully selected bogs which are subjected to stringent internal and governmental inspection. This pellet is a 36 mm and will expand 1.50 inch x 1.50.