Get a jump-start on planting with the Seedling Heat Mat, our easiest to use and most popular seed mat! Germinate your seeds faster and also increase seedling and cutting success. The mats warm the rooting area 10 - 20F over the ambient temperature. Waterproof construction with complete instructions printed on the mat. The
9" x 19-1/2" size will accommodate one common seed flat, while the 20" x 20" will fit up to two common seed flats. Thermostat not required.