Root Radiance seedling heat mat warms root area up to 20 degrees over ambient temperature, improving the germination process and overall success of seedlings and cuttings. Durable, portable and water resistant, it's ideal for greenhouses, nurseries, and indoor gardens. The series features a Master Mat and Add-On mats, daisy chain capable with a Master Mat handling up to 3 Add-Ons, accommodating up to 5 10''x20'' seedling trays.