When to Plant Vegetables in Your State: Dates From Each State's Extension Service
Each page copies one state's own extension planting calendar for one crop, row by row, and sets it beside NOAA frost dates for that state's cities. Nothing is averaged across states.
Updated
A state's extension service knows its own climate, so these pages quote the state's own calendar instead of a national rule. Where a state splits its table by zone or region, the page keeps one row per region. Only crops a state's saved calendar actually lists have a page, which is why the states below do not all cover the same crops. For a date counted from your own frost date instead, use the spring planting planner, and for the frost dates themselves the frost dates tool.
Virginia
Virginia Cooperative Extension: spring and fall dates for zones.
Illinois
University of Illinois Extension: spring and fall dates for regions.
Kentucky
University of Kentucky Cooperative Extension: spring and fall dates for regions.
South Carolina
Clemson Cooperative Extension: spring and fall dates for regions.
Missouri
MU Extension, University of Missouri: spring and fall dates for regions.
California
UC Master Gardener Program: planting months for regions.
Alabama
Alabama Cooperative Extension System: spring and fall dates for parts of the state.
Texas
Texas A&M AgriLife Extension: fall planting dates for regions.
Georgia
University of Georgia Cooperative Extension: spring and fall dates for parts of the state.
North Carolina
NC State Extension: spring and fall dates for parts of the state.
States and crops left out
A state is missing when its extension table could not be read reliably from the saved copy, when it gave no dates for the crop, or when the table was only available as an image. Florida's, Mississippi's, Arkansas's and Oklahoma's calendars did not meet that test, and Texas A&M's spring dates are not printed as dates. Details are in the methodology.