Self Grow Cat Nip Tray - Cats just love this plant. It is also easy to grow and makes a good groundcover or massed bedding plant. The Seed Raiser contains Catnip Seed, a premeasured amount of seed raising mix, a reusable growing tray and a clear lid. Mr Fothergill's Seed Raiser Kits have been designed to provide a convenient solution for seed raising. The Kit consists of a quality mini greenhouse, Jiffy Quick Soil Mix pellet and a full packet of Mr Fothergill's Organic seeds.