Harman US

Planting Calendar for ZIP 61240

Based on your local frost dates - last spring frost around Apr 24, first fall frost around Oct 18 - here is when to plant 79 common crops near ZIP 61240.

Last spring frost
Apr 24
First fall frost
Oct 18
Hardiness zone
5b

Vegetables

Crop Start seeds indoors Plant outside Fall planting by
Tomatoes Mar 13 May 1 (Transplant out) -
Peppers Feb 27 May 8 (Transplant out) -
Cucumbers Apr 3 May 1 (Transplant out) Aug 10
Zucchini Apr 3 May 1 (Transplant out) Aug 15
Summer Squash Apr 3 May 1 (Transplant out) Aug 13
Winter Squash Apr 3 May 1 (Transplant out) -
Pumpkins Apr 3 May 1 (Transplant out) -
Green Beans - Apr 24 (Direct sow) Aug 10
Sweet Corn - May 1 (Direct sow) -
Melons Apr 3 May 8 (Transplant out) -
Watermelon Apr 3 May 8 (Transplant out) -
Okra - May 8 (Direct sow) -
Eggplant Feb 27 May 8 (Transplant out) -
Lettuce Mar 27 Mar 27 (Transplant out) Aug 15
Spinach - Mar 13 (Direct sow) Aug 20
Kale Mar 13 Apr 3 (Transplant out) Aug 10
Peas - Mar 13 (Direct sow) Aug 5
Carrots - Apr 3 (Direct sow) Jul 26
Beets - Mar 27 (Direct sow) Aug 10
Radishes - Mar 27 (Direct sow) Sep 6
Broccoli Mar 13 Apr 10 (Transplant out) Jul 31
Cauliflower Mar 13 Apr 10 (Transplant out) Jul 26
Cabbage Mar 13 Apr 3 (Transplant out) Jul 26
Onions Feb 13 Mar 27 (Transplant out) -
Potatoes - Apr 10 (Direct sow) -
Swiss Chard Mar 27 Apr 10 (Transplant out) Aug 10
Sweet Potatoes - May 15 (Direct sow) -
Brussels Sprouts Mar 13 Apr 10 (Transplant out) Jun 26
Celery Feb 13 May 1 (Transplant out) -
Leeks Feb 13 Apr 10 (Transplant out) Jun 6
Turnips - Apr 10 (Direct sow) Aug 15
Rutabaga - Apr 24 (Direct sow) Jul 1
Parsnips - Apr 10 (Direct sow) Jun 6
Kohlrabi Mar 27 Apr 10 (Transplant out) Aug 10
Collard Greens Mar 13 Apr 10 (Transplant out) Jul 31
Mustard Greens - Apr 10 (Direct sow) Aug 20
Arugula - Apr 10 (Direct sow) Aug 25
Bok Choy Mar 27 Apr 10 (Transplant out) Aug 15
Green Onions - Apr 10 (Direct sow) Aug 5
Tomatillos Mar 13 May 1 (Transplant out) -
Fennel Mar 27 Apr 10 (Transplant out) Jul 16
Popcorn Apr 24 May 8 (Transplant out) -
Black-Eyed Peas Apr 24 May 8 (Transplant out) Jul 16
Lima Beans Apr 24 May 8 (Transplant out) -
Edamame Apr 24 May 8 (Transplant out) -
Peanuts Apr 24 May 8 (Transplant out) -
Globe Artichoke Feb 27 Apr 10 (Transplant out) Jul 6
Horseradish Apr 24 Apr 10 (Transplant out) -
Ground Cherries Mar 13 May 8 (Transplant out) -
Radicchio Mar 20 Apr 10 (Transplant out) Jul 26
Endive Mar 20 Apr 10 (Transplant out) Jul 6
Watercress Apr 3 Apr 10 (Transplant out) Aug 5
Sorrel Mar 13 Apr 3 (Transplant out) Aug 5
Sunchokes Apr 24 Apr 10 (Transplant out) -
Malabar Spinach Mar 13 May 8 (Transplant out) -
Amaranth Greens Apr 3 May 8 (Transplant out) Aug 20
Luffa Gourd Mar 13 May 8 (Transplant out) -
New Zealand Spinach Mar 27 May 8 (Transplant out) -
Fava Beans Apr 24 Mar 27 (Transplant out) Jul 11
Chayote Mar 27 May 8 (Transplant out) -
Corn Salad Apr 24 Mar 27 (Transplant out) Aug 5
Bitter Melon Mar 27 May 8 (Transplant out) -
Cardoon Mar 13 Apr 24 (Transplant out) -

Herbs

Crop Start seeds indoors Plant outside Fall planting by
Basil Mar 13 May 1 (Transplant out) -
Cilantro - Apr 10 (Direct sow) Aug 15
Parsley Feb 27 May 8 (Transplant out) Jul 21
Dill - May 1 (Direct sow) Aug 5
Lemon Balm Mar 13 Apr 24 (Transplant out) -
Borage Apr 24 Apr 24 (Transplant out) Aug 10
Chervil Apr 24 Apr 3 (Transplant out) Aug 10
Lemongrass Feb 27 May 8 (Transplant out) -
Summer Savory Mar 13 Apr 24 (Transplant out) -
Marjoram Mar 13 May 1 (Transplant out) -
Lovage Mar 13 Apr 24 (Transplant out) Jul 6
Anise Hyssop Feb 27 Apr 24 (Transplant out) -
Shiso Mar 13 May 1 (Transplant out) -
Stevia Feb 27 May 8 (Transplant out) -
Chamomile Mar 13 Apr 10 (Transplant out) Jul 31
Tarragon Apr 24 Apr 24 (Transplant out) -
How to read this calendar

Start seeds indoors is when to sow in trays inside so seedlings are ready to transplant. Plant outside is when to transplant seedlings or direct-sow seed, based on frost tolerance. Fall planting by is the latest date to start a fall crop and still harvest before the first fall frost. Tender crops wait until after the last spring frost; hardy crops can go out earlier.

Computed from NOAA 1991–2020 Climate Normals at Moline Quad City Intl Ap, Il, 5.3 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.

Full frost dates for 61240 Local weather →