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Cauliflower planting and harvest datesCauliflower Planting Dates in Northern Illinois
Usual cauliflower planting periods in Northern 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 |
|---|---|---|---|
| Transplanting | July 24 to Aug. 10 | source | 2026-11-11 |
| Item | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Transplanting | Transplanting window in July | Transplanting window in August |
What these dates mean in Northern Illinois
Transplanting usually runs about 18 days, from Jul 24 to Aug 10.
That start date is about 56 days later than the middle of the 4 places in this data set that report cauliflower transplanting dates (May 29).
Frost-date caveat: these are published ranges for Northern 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
Cauliflower dates in other places
- Arkansas
- Central Florida
- Central Illinois
- Central North Carolina
- Central Oregon
- Central and higher-elevation Eastern Oregon
- Columbia and Snake River valleys, Oregon
- Eastern North Carolina
- Maricopa County, Arizona
- Minnesota
- New Hampshire
- Oregon Coast
- South Florida
- Southern Illinois
- Western North Carolina
- Western Oregon
- Western valleys (Portland, Roseburg, Medford), Oregon
Other crops in Northern Illinois
- Asparagus
- Beets
- Broccoli
- Bush Beans
- Cabbage
- Carrots
- Chard
- Corn (home garden)
- Cucumber
- 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).