Vegetables · herbs · fruit

Vegetable planting calendar, counted in weeks from your last frost

For each crop we set the university Extension services side by side: how many weeks before or after the last spring frost they plant, how warm they want the soil, and the planting dates they publish for their own state. Each statement is theirs, with a link to the page it came from and the day we checked it.

Your last frost date is not on this site. It changes from town to town and year to year, and we have no source we can use for it. Your state’s Extension service or the NOAA climate normals mapper can give you one.

Your hardiness zone

A hardiness zone tells you how cold winters get, which matters for perennials. It does not tell you your frost dates; for those, look up the NOAA 1991–2020 climate normals for a station near you, or ask your state’s Extension service.

Zone: USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture. Accessed from https://planthardiness.ars.usda.gov.
ZIP code listing: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed 2026-09-27. Shown exactly as published; this is a text lookup, not the official map. The official zone finder is at planthardiness.ars.usda.gov.

Crops

How to read a crop page

Each line starts with who said it, for example “Illinois Extension says”. When only one Extension service gives a number, such as how many weeks after frost or how far apart to space plants, you see that one service’s number and nobody else’s. When two disagree, both lines are shown.

State planting dates are for that state or region only. They are a useful check if you live nearby, and a rough guide if you do not.