Jiffy Peat Pellets are made of compressed peat, wood pulp and coir pith that expand with water to provide the ideal growing medium for seeds. The pellet is both the pot and soil at the same time. Use in Jiffy greenhouses or Mr Fothergill’s propagation trays to give your plants the best start in life. Plant the pellet and all when seedlings are large enough to handle. This will prevent transplant shock by not disturbing the plant’s fragile root system.