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Lettuce planting and harvest datesLettuce Planting Dates in Southern Illinois
Usual lettuce planting periods in Southern Illinois, shown as ranges with their source. Use them to frame a plan, then adjust for your own frost dates and soil temperature.
| Activity | Window | Source | Last verified |
|---|---|---|---|
| Planting | March 15 to April 15, June 15 to Aug. 15 | source | 2026-11-11 |
| Item | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Planting | Planting window in March | Planting window in April | Planting window in June | Planting window in July | Planting window in August |
What these dates mean in Southern Illinois
Planting usually runs about 32 days, from Mar 15 to Apr 15.
That start date is about 17 days earlier than the middle of the 13 places in this data set that report lettuce planting dates (Apr 1).
Frost-date caveat: these are published ranges for Southern Illinois. A northern or high-elevation site will run later than a southern or low one, and a cold wet spring can push planting past the window. Planting dates are a general guide; frost dates and local conditions vary. Check your last spring frost and soil temperature, and confirm with your county extension office.
Related guides
Lettuce dates in other places
- Arkansas
- Central Florida
- Central Illinois
- Central and higher-elevation Eastern Oregon
- Columbia and Snake River valleys, Oregon
- New Hampshire
- North Florida
- Northern Illinois
- Oregon Coast
- South Florida
- Utah
- Western Oregon
- Western valleys (Portland, Roseburg, Medford), Oregon
Other crops in Southern Illinois
- Asparagus
- Beets
- Broccoli
- Bush Beans
- Cabbage
- Carrots
- Cauliflower
- Chard
- Corn (home garden)
- Cucumber
- Eggplant
- Endive
- Garlic
- Green onions (sets)
- Kale
- Kohlrabi
- Muskmelon
- Mustard
- Okra
- Parsnip
- Peas
- Pepper
- Pole Beans
- Potato
- Pumpkin
- Radish
- Rhubarb
- Rutabaga
- Spinach
- Squash (summer)
- Squash (winter)
- Sweet Potato
- Tomato
- Turnip
- Watermelon
Last reviewed: November 2026. Source: Illinois Extension - When to Plant (Home Vegetable Gardening).