Description from Gardener's Supply Co.
Bottom Heat Jump-Starts Your Seedlings
- Heat Mats provide consistent bottom heat for fast germination and vigorous root growth
- Can be used indoors or in greenhouse
- Available in three sizes
These Heat Mats speed seed germination and stimulate root growth by keeping soil at about 70º F. Here’s a clever extra — instructions and growing tips are printed right on the mat, so you can’t lose them. 9″ x 19″ mat holds a standard seed flat. 20-3/4″ square mat holds two standard seed flats. 48″ x 20″ mat holds 4 flats. All sizes have 6-ft power cords.
- Warms root area 10 to 20 degrees above ambient temperature
- 6′ power cord
- 19″ x 9″ mat is 20 watts
- 20-3/4″ square mat is 45 watts
- 48″ x 20″ mat is 107 watts