Use With Soil-warming Cables & The Thermostat Regulates The Perfect Soil Temperature Range For Seed Germination & Bringing On Young Plants.with A Little Warmth, Roots Respond Even Better To Growth & Nutrient Absorption Meaning You’ll Get Stronger Young Plants With Well-established Root Systems Which Flower More & Flower Earlier.when Growing Vegetable Crops, This Means More Harvests Earlier In The Season. simply Set Your Thermostat For The Perfect Temperature Range. It Automatically Cuts Off At A Set Maximum Temperature & Turns On Again At A Minimum Temperature.