Soil Temperature Guide: When Each Vegetable Seed Actually Germinates

oil thermometer probe inserted into spring garden bed measuring temperature for vegetable seed germination

Seed packets say “plant after last frost.” Soil temperature is the real trigger. A $10 probe thermometer eliminates more planting failures than any other tool in the garden. Most seed germination failures trace back to soil temperature, not timing on the calendar. According to research from the University of California, Davis Department of Vegetable Crops, … Read more