Jump Start Seedling Heat Mat, 3" x 20", 7.3W

Compact Bottom Heat for Windowsills & Small Spaces

A full-size greenhouse heat mat is more mat than a windowsill herb garden or a handful of starter pots needs, and it can be awkward to fit on a narrow sill. Jump Start's windowsill heat mat is sized for small growing spaces, warming the root area 10 to 20 degrees Fahrenheit over ambient temperature to improve germination without taking over the whole sill.

This compact 3 x 20 inch mat is suited for veteran growers, beginners, and kids alike, maintaining a controlled temperature all season long so a drafty windowsill container garden gets a more stable growing environment.

Key Features & Benefits

• Compact 3 x 20 Inch Size — fits small growing spaces and narrow windowsills.
• Warms Root Area 10-20°F Over Ambient — improves germination success on a sill or small bench.
• UL Listed — includes a power cord.
• Maintains Controlled Temperature — all season long.

Who Should Use This Heat Mat

Windowsill gardeners, beginners, and kids who want a compact heat mat sized for small growing spaces rather than a full greenhouse bench.

About Jump Start

Jump Start, a Hydrofarm brand, builds propagation equipment sized for a range of growing spaces, from this compact windowsill mat up to its full-size waterproof greenhouse heat mats.

Frequently Asked Questions

What size is this mat?

3 inches by 20 inches. That footprint is sized to fit a windowsill or a small cluster of starter pots rather than a full greenhouse bench.

Is this mat good for beginners?

Yes, it's suited for veteran growers, beginners, and kids alike. The compact size and simple plug-in operation make it approachable for a first-time seed starter.

Does it include a power cord?

Yes, a power cord is included, and the mat is UL listed. No separate purchase is needed to get it running.

How is this different from Jump Start's other heat mats?

It's a compact, windowsill-sized mat rather than the larger waterproof mats built for greenhouse benches. Growers with more than a few pots or a wetter growing environment should look at the larger, waterproof Jump Start heat mats instead.