Western NC mountains, southern PA, central OH, northern MO. Average last spring frost May 1, first fall frost October 1 — a 153-day frost-free season.
Windows are calculated from your zone's average frost dates. Adjust ±1 week for microclimates, elevation, and your own frost records.
Each seed cluster contains multiple embryos — thin ruthlessly to 3 inches or roots stay small.
Plant near: onions, brassicas, lettuce
Keep away from: pole beans
BAU Farm Intelligence turns these windows into per-field tasks — indoor seed-start reminders, transplant dates, harvest projections — using your farm's actual frost history.