Hydrofarm's windowsill heat mat is perfect for veteran growers, beginners, and children too. It is the perfect size for small growing spaces, and improves germination by warming the root area 10-20°F over ambient temperature. By warming the roots, you increase your growing success, as this mat will maintain a controlled temperature all season long. If you ever dreamed of growing a windowsill container garden but found the area just a bit too drafty, add this heat mat and you'll be ready to get growing.

Features:

• 3" x 20"
• UL listed
• Includes power cord