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Crop dates by placePotato Planting Dates by State and Region
Published potato planting windows for 4 places, with the source and the caveats you need before you use them.
Across the 3 places in this data set, the planting window begins as early as Mar 15 (Southern Illinois) and as late as Apr 15 (Northern Illinois). The middle of the range starts around Apr 1.
| Place | Planting | Harvest |
|---|---|---|
| Central Illinois | Planting: April 1 to 15 | |
| New Hampshire | Planting: plant seed potatoes in garden 1-2 weeks before last frost | |
| Northern Illinois | Planting: April 15 to 30 | |
| Southern Illinois | Planting: March 15 to 30 |
Calendar view
| Item | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Central Illinois planting | Planting window in April | |||||||||||
| New Hampshire planting | Timing in table above | |||||||||||
| Northern Illinois planting | Planting window in April | |||||||||||
| Southern Illinois planting | Planting window in March | |||||||||||
Frost-date caveat: ranges blur real differences inside a state or region. Use them to plan, then fit them to your last frost date, soil temperature and field conditions.
Related guides
- Potato Planting Calendar by Zone
- Sweet Potato Planting Calendar
- Colorado Potato Beetle Calendar
- Potato Harvest and Storage Calendar
Last reviewed: November 2026. Source: Illinois Extension - When to Plant (Home Vegetable Gardening).