PlantDates is a set of free garden calculators for US gardeners — frost dates by ZIP, planting calendars by zone, plus bed, soil and spacing math. Frost dates come from 1991–2020 climate normals at 6,183 locations, and it says plainly that a median date is a coin flip — half of years frost later.
In
Home & garden sites that earned a spot
Plants, lawns and home projects — the sites people open with dirt on their hands.
2 sites · every one earned it
LawnDates tells US homeowners when to overseed, aerate, fertilize and put down pre-emergent for their own ZIP. Each city calendar names the actual NOAA station its dates come from and how far away it sits, then calls every window a starting point rather than a deadline.