Crop calendar directory
Planting windows. Harvest windows. By state. By crop.
The reference farmers actually use. 900 state-crop calendars anchored to USDA hardiness zones, NOAA frost-date norms, and your state's land-grant extension service for variety-level guidance. Updated for the 2026 season.
Climate is local. Treat these calendars as anchor points, then verify against your county and your soil temperature reality. Every page links back to your state extension service.
Browse
By crop
One page per crop with the full state-by-state planting calendar.
Row Crop
Vegetables
Forages
Browse
By state
One page per state with all 18 crops and your state extension service.
Click a state for its planting and harvest windows across all 18 crops.
Alabama
Zone 8a
Alaska
Zone 4a
Arizona
Zone 8b
Arkansas
Zone 7b
California
Zone 9a
Colorado
Zone 5b
Connecticut
Zone 6b
Delaware
Zone 7a
Florida
Zone 9b
Georgia
Zone 8a
Hawaii
Zone 11a
Idaho
Zone 5b
Illinois
Zone 6a
Indiana
Zone 6a
Iowa
Zone 5a
Kansas
Zone 6a
Kentucky
Zone 6b
Louisiana
Zone 9a
Maine
Zone 5a
Maryland
Zone 7a
Massachusetts
Zone 6a
Michigan
Zone 5b
Minnesota
Zone 4a
Mississippi
Zone 8a
Missouri
Zone 6b
Montana
Zone 4b
Nebraska
Zone 5a
Nevada
Zone 7a
New Hampshire
Zone 5b
New Jersey
Zone 7a
New Mexico
Zone 7a
New York
Zone 5b
North Carolina
Zone 7b
North Dakota
Zone 4a
Ohio
Zone 6a
Oklahoma
Zone 7a
Oregon
Zone 8a
Pennsylvania
Zone 6b
Rhode Island
Zone 7a
South Carolina
Zone 8a
South Dakota
Zone 4b
Tennessee
Zone 7a
Texas
Zone 8b
Utah
Zone 6b
Vermont
Zone 5a
Virginia
Zone 7a
Washington
Zone 8a
West Virginia
Zone 6b
Wisconsin
Zone 5a
Wyoming
Zone 4b
Sources & trust
Where this data comes from.
- USDA Plant Hardiness Zone Map (2023 update) — for state-level zone assignments.
- NOAA / NCDC climate normals — for typical last-spring and first-fall frost dates.
- USDA NRCS plant materials & land-grant extension publications — for crop-level agronomic data (soil temp, GDD, frost tolerance, common pests & diseases).
- State land-grant extension services — every page links directly to the relevant extension. Variety recommendations live with extension trial reports — we don't republish them, we point at the source.
Calendar windows are computed from a hardiness-zone × crop offset matrix using widely-published USDA frost-date norms. They are flagged as “estimated” — accurate to within a typical county's climate band, but not a substitute for soil-temp measurement on your fields.
Calendars are the floor. Soil temp is the truth.
Bield: Farm pulls live soil temperature from weather stations in your county and tells you the day your field actually clears the threshold for your target crop.
Start free trial →