Root Radiance seedling heat mat improves the germination process and overall success of seedlings and cuttings by warming the root area 10 to 20 degrees over ambient temperature. Perfectly suited for greenhouses. Root Radiance seedling heat mat improves the germination process and overall success of seedlings and cuttings by warming the root area 10 to 20 degrees over ambient temperature. Perfectly suited for greenhouses, nurseries, and indoor gardens, Root Radiance seedling heat mat is durable, portable, and water resistant. Also includes a 6 foot 120V power cord.