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Cucumber planting and harvest datesCucumber Planting Dates in Central Illinois
Usual cucumber planting periods in Central 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 | May 10 to June 15 | source | 2026-11-11 |
| Item | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Planting | Planting window in May | Planting window in June |
What these dates mean in Central Illinois
Planting usually runs about 37 days, from May 10 to Jun 15.
That start date is close to the middle of the 3 places in this data set that report cucumber planting dates (May 10).
Frost-date caveat: these are published ranges for Central 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
Cucumber dates in other places
Other crops in Central Illinois
- Asparagus
- Beets
- Broccoli
- Bush Beans
- Cabbage
- Carrots
- Cauliflower
- Chard
- Corn (home garden)
- Eggplant
- Endive
- Garlic
- Green onions (sets)
- Kale
- Kohlrabi
- Lettuce
- 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).