Hydrofarm Jump Start Hydroponic Heat Mat, 17 WattGive seeds and cuttings the warmth they need to thrive with the Hydrofarm Jump Start Hydroponic Heat Mat. Re engineered for improved performance and durability, this heat mat features stronger internal heating wire and a thicker multi layer design to deliver consistent, uniform warmth. Designed to withstand rugged greenhouse environments, this low wattage heat mat gently warms the root zone to encourage faster germination and healthier early growth.