Harman US

Planting Calendar for ZIP 52325

Based on your local frost dates - last spring frost around Apr 28, first fall frost around Oct 9 - here is when to plant 79 common crops near ZIP 52325.

Last spring frost
Apr 28
First fall frost
Oct 9
Hardiness zone
5b

Vegetables

Crop Start seeds indoors Plant outside Fall planting by
Tomatoes Mar 17 May 5 (Transplant out) -
Peppers Mar 3 May 12 (Transplant out) -
Cucumbers Apr 7 May 5 (Transplant out) Aug 1
Zucchini Apr 7 May 5 (Transplant out) Aug 6
Summer Squash Apr 7 May 5 (Transplant out) Aug 4
Winter Squash Apr 7 May 5 (Transplant out) -
Pumpkins Apr 7 May 5 (Transplant out) -
Green Beans - Apr 28 (Direct sow) Aug 1
Sweet Corn - May 5 (Direct sow) -
Melons Apr 7 May 12 (Transplant out) -
Watermelon Apr 7 May 12 (Transplant out) -
Okra - May 12 (Direct sow) -
Eggplant Mar 3 May 12 (Transplant out) -
Lettuce Mar 31 Mar 31 (Transplant out) Aug 6
Spinach - Mar 17 (Direct sow) Aug 11
Kale Mar 17 Apr 7 (Transplant out) Aug 1
Peas - Mar 17 (Direct sow) Jul 27
Carrots - Apr 7 (Direct sow) Jul 17
Beets - Mar 31 (Direct sow) Aug 1
Radishes - Mar 31 (Direct sow) Aug 28
Broccoli Mar 17 Apr 14 (Transplant out) Jul 22
Cauliflower Mar 17 Apr 14 (Transplant out) Jul 17
Cabbage Mar 17 Apr 7 (Transplant out) Jul 17
Onions Feb 17 Mar 31 (Transplant out) -
Potatoes - Apr 14 (Direct sow) -
Swiss Chard Mar 31 Apr 14 (Transplant out) Aug 1
Sweet Potatoes - May 19 (Direct sow) -
Brussels Sprouts Mar 17 Apr 14 (Transplant out) Jun 17
Celery Feb 17 May 5 (Transplant out) -
Leeks Feb 17 Apr 14 (Transplant out) May 28
Turnips - Apr 14 (Direct sow) Aug 6
Rutabaga - Apr 28 (Direct sow) Jun 22
Parsnips - Apr 14 (Direct sow) May 28
Kohlrabi Mar 31 Apr 14 (Transplant out) Aug 1
Collard Greens Mar 17 Apr 14 (Transplant out) Jul 22
Mustard Greens - Apr 14 (Direct sow) Aug 11
Arugula - Apr 14 (Direct sow) Aug 16
Bok Choy Mar 31 Apr 14 (Transplant out) Aug 6
Green Onions - Apr 14 (Direct sow) Jul 27
Tomatillos Mar 17 May 5 (Transplant out) -
Fennel Mar 31 Apr 14 (Transplant out) Jul 7
Popcorn Apr 28 May 12 (Transplant out) -
Black-Eyed Peas Apr 28 May 12 (Transplant out) Jul 7
Lima Beans Apr 28 May 12 (Transplant out) -
Edamame Apr 28 May 12 (Transplant out) -
Peanuts Apr 28 May 12 (Transplant out) -
Globe Artichoke Mar 3 Apr 14 (Transplant out) Jun 27
Horseradish Apr 28 Apr 14 (Transplant out) -
Ground Cherries Mar 17 May 12 (Transplant out) -
Radicchio Mar 24 Apr 14 (Transplant out) Jul 17
Endive Mar 24 Apr 14 (Transplant out) Jun 27
Watercress Apr 7 Apr 14 (Transplant out) Jul 27
Sorrel Mar 17 Apr 7 (Transplant out) Jul 27
Sunchokes Apr 28 Apr 14 (Transplant out) -
Malabar Spinach Mar 17 May 12 (Transplant out) -
Amaranth Greens Apr 7 May 12 (Transplant out) Aug 11
Luffa Gourd Mar 17 May 12 (Transplant out) -
New Zealand Spinach Mar 31 May 12 (Transplant out) -
Fava Beans Apr 28 Mar 31 (Transplant out) Jul 2
Chayote Mar 31 May 12 (Transplant out) -
Corn Salad Apr 28 Mar 31 (Transplant out) Jul 27
Bitter Melon Mar 31 May 12 (Transplant out) -
Cardoon Mar 17 Apr 28 (Transplant out) -

Herbs

Crop Start seeds indoors Plant outside Fall planting by
Basil Mar 17 May 5 (Transplant out) -
Cilantro - Apr 14 (Direct sow) Aug 6
Parsley Mar 3 May 12 (Transplant out) Jul 12
Dill - May 5 (Direct sow) Jul 27
Lemon Balm Mar 17 Apr 28 (Transplant out) -
Borage Apr 28 Apr 28 (Transplant out) Aug 1
Chervil Apr 28 Apr 7 (Transplant out) Aug 1
Lemongrass Mar 3 May 12 (Transplant out) -
Summer Savory Mar 17 Apr 28 (Transplant out) -
Marjoram Mar 17 May 5 (Transplant out) -
Lovage Mar 17 Apr 28 (Transplant out) Jun 27
Anise Hyssop Mar 3 Apr 28 (Transplant out) -
Shiso Mar 17 May 5 (Transplant out) -
Stevia Mar 3 May 12 (Transplant out) -
Chamomile Mar 17 Apr 14 (Transplant out) Jul 22
Tarragon Apr 28 Apr 28 (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 Williamsburg 1E, Ia, 6.7 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.

Full frost dates for 52325 Local weather →