Why Peat? Jiffy peat is the root of a great garden. Improves soil structure and increases water retention. Peat moss can retain up to 20 times its weight in water.¹ Aerates and improves drainage of heavy clay soils, allowing roots to breathe, grow and better absorb nutrients.¹ A natural resource free of weeds and pollutants, eliminating the need for pesticides.¹