Hydrofarm Jump Start Seedling Heat Mat, 20 x 20 in
- Made for
- Warming one or two seed trays on a counter, shelf or floor.
- Drawbacks
- No thermostat included.
| Type | Heat mat |
|---|---|
| Where it goes |
|
| Width | 20 inches |
| Depth | 20 inches |
| Height, fully grown | Not listed by the maker |
| Seedlings at once | Not listed by the maker |
| Tiers or shelves | Not listed by the maker |
| Power use | 45 watts |
| Thermostat included | No |
| Needs an outlet | Yes |
| Good to know | No thermostat included. Utah State Extension suggests using a heat mat with a thermostat so seed containers don't get too hot (USU Extension). Penn State Extension says the same (Penn State Extension). |
Where to buy
- Park Seed$54.95 when we checked on Oct 22, 2026Check price at Park Seed (opens in a new tab)
- AmazonSold by CartsAndClicks (marketplace seller; ships from CartsAndClicks)$37.31 when we checked on Oct 22, 2026Check price at Amazon (opens in a new tab)
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What else you need
The maker doesn't list anything else you need.
Works with
- Burpee 72-Cell Self-Watering Seed Starting KitThe 10 × 20 in kit fits on the 20 × 20 in mat (derived from the makers' sizes).
- Gardener's Supply GrowEase Seed Starter Kit, 24 cellsThe 14 3/4 × 9 1/4 in kit fits on the 20 × 20 in mat (derived from the makers' sizes).