The Growing Season 🌱

Every American county has a window — the days between the last spring freeze and the first fall freeze — and a heat budget to spend inside it. This is that window, mapped: frost dates and their odds, growing degree days at six agronomic bases, plant hardiness zones, and the winter chill hours fruit trees need, all from the 1951–2026 nClimGrid record and live through yesterday. Then 300 crops, trees, vegetables and fruits matched against it — and, where the USDA counts them, the acres your county actually plants. Tap a state to drill in.