Everyone Says "Wait for Warm Soil" — Here's What Soil Actually Needs to Hit 60°F

https://claytoncllo171.tearosediner.net/when-to-plant-by-soil-temperature-the-simple-60-f-rule-and-how-to-measure-it

How my backyard experiment lost half its seedlings by planting too soon I’m going to be blunt: we all pretended that “last frost date” was the rule and started sowing when we felt optimistic