Economy Soil Heating Cable
These insulated soil heating cables gently warm your growing medium for faster germination and better growth. Use them indoors or out, in containers, cold frames, or right in the ground. The built-in thermostat maintains 77° F - 85° F. 120 volts. Recommended for seasonal use.
12 ft -- 32 watts, covers 3 sq ft
24 ft -- 80 Watts, covers 6 sq ft
48 ft -- 140 Watts, covers 12 sq ft