Planting Calendar for ZIP 51579
Based on your local frost dates - last spring frost around Apr 29, first fall frost around Oct 8 - here is when to plant 79 common crops near ZIP 51579.
Last spring frost
Apr 29
First fall frost
Oct 8
Hardiness zone
5b
Vegetables
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Tomatoes | Mar 18 | May 6 (Transplant out) | - |
| Peppers | Mar 4 | May 13 (Transplant out) | - |
| Cucumbers | Apr 8 | May 6 (Transplant out) | Jul 31 |
| Zucchini | Apr 8 | May 6 (Transplant out) | Aug 5 |
| Summer Squash | Apr 8 | May 6 (Transplant out) | Aug 3 |
| Winter Squash | Apr 8 | May 6 (Transplant out) | - |
| Pumpkins | Apr 8 | May 6 (Transplant out) | - |
| Green Beans | - | Apr 29 (Direct sow) | Jul 31 |
| Sweet Corn | - | May 6 (Direct sow) | - |
| Melons | Apr 8 | May 13 (Transplant out) | - |
| Watermelon | Apr 8 | May 13 (Transplant out) | - |
| Okra | - | May 13 (Direct sow) | - |
| Eggplant | Mar 4 | May 13 (Transplant out) | - |
| Lettuce | Apr 1 | Apr 1 (Transplant out) | Aug 5 |
| Spinach | - | Mar 18 (Direct sow) | Aug 10 |
| Kale | Mar 18 | Apr 8 (Transplant out) | Jul 31 |
| Peas | - | Mar 18 (Direct sow) | Jul 26 |
| Carrots | - | Apr 8 (Direct sow) | Jul 16 |
| Beets | - | Apr 1 (Direct sow) | Jul 31 |
| Radishes | - | Apr 1 (Direct sow) | Aug 27 |
| Broccoli | Mar 18 | Apr 15 (Transplant out) | Jul 21 |
| Cauliflower | Mar 18 | Apr 15 (Transplant out) | Jul 16 |
| Cabbage | Mar 18 | Apr 8 (Transplant out) | Jul 16 |
| Onions | Feb 18 | Apr 1 (Transplant out) | - |
| Potatoes | - | Apr 15 (Direct sow) | - |
| Swiss Chard | Apr 1 | Apr 15 (Transplant out) | Jul 31 |
| Sweet Potatoes | - | May 20 (Direct sow) | - |
| Brussels Sprouts | Mar 18 | Apr 15 (Transplant out) | Jun 16 |
| Celery | Feb 18 | May 6 (Transplant out) | - |
| Leeks | Feb 18 | Apr 15 (Transplant out) | May 27 |
| Turnips | - | Apr 15 (Direct sow) | Aug 5 |
| Rutabaga | - | Apr 29 (Direct sow) | Jun 21 |
| Parsnips | - | Apr 15 (Direct sow) | May 27 |
| Kohlrabi | Apr 1 | Apr 15 (Transplant out) | Jul 31 |
| Collard Greens | Mar 18 | Apr 15 (Transplant out) | Jul 21 |
| Mustard Greens | - | Apr 15 (Direct sow) | Aug 10 |
| Arugula | - | Apr 15 (Direct sow) | Aug 15 |
| Bok Choy | Apr 1 | Apr 15 (Transplant out) | Aug 5 |
| Green Onions | - | Apr 15 (Direct sow) | Jul 26 |
| Tomatillos | Mar 18 | May 6 (Transplant out) | - |
| Fennel | Apr 1 | Apr 15 (Transplant out) | Jul 6 |
| Popcorn | Apr 29 | May 13 (Transplant out) | - |
| Black-Eyed Peas | Apr 29 | May 13 (Transplant out) | Jul 6 |
| Lima Beans | Apr 29 | May 13 (Transplant out) | - |
| Edamame | Apr 29 | May 13 (Transplant out) | - |
| Peanuts | Apr 29 | May 13 (Transplant out) | - |
| Globe Artichoke | Mar 4 | Apr 15 (Transplant out) | Jun 26 |
| Horseradish | Apr 29 | Apr 15 (Transplant out) | - |
| Ground Cherries | Mar 18 | May 13 (Transplant out) | - |
| Radicchio | Mar 25 | Apr 15 (Transplant out) | Jul 16 |
| Endive | Mar 25 | Apr 15 (Transplant out) | Jun 26 |
| Watercress | Apr 8 | Apr 15 (Transplant out) | Jul 26 |
| Sorrel | Mar 18 | Apr 8 (Transplant out) | Jul 26 |
| Sunchokes | Apr 29 | Apr 15 (Transplant out) | - |
| Malabar Spinach | Mar 18 | May 13 (Transplant out) | - |
| Amaranth Greens | Apr 8 | May 13 (Transplant out) | Aug 10 |
| Luffa Gourd | Mar 18 | May 13 (Transplant out) | - |
| New Zealand Spinach | Apr 1 | May 13 (Transplant out) | - |
| Fava Beans | Apr 29 | Apr 1 (Transplant out) | Jul 1 |
| Chayote | Apr 1 | May 13 (Transplant out) | - |
| Corn Salad | Apr 29 | Apr 1 (Transplant out) | Jul 26 |
| Bitter Melon | Apr 1 | May 13 (Transplant out) | - |
| Cardoon | Mar 18 | Apr 29 (Transplant out) | - |
Herbs
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Basil | Mar 18 | May 6 (Transplant out) | - |
| Cilantro | - | Apr 15 (Direct sow) | Aug 5 |
| Parsley | Mar 4 | May 13 (Transplant out) | Jul 11 |
| Dill | - | May 6 (Direct sow) | Jul 26 |
| Lemon Balm | Mar 18 | Apr 29 (Transplant out) | - |
| Borage | Apr 29 | Apr 29 (Transplant out) | Jul 31 |
| Chervil | Apr 29 | Apr 8 (Transplant out) | Jul 31 |
| Lemongrass | Mar 4 | May 13 (Transplant out) | - |
| Summer Savory | Mar 18 | Apr 29 (Transplant out) | - |
| Marjoram | Mar 18 | May 6 (Transplant out) | - |
| Lovage | Mar 18 | Apr 29 (Transplant out) | Jun 26 |
| Anise Hyssop | Mar 4 | Apr 29 (Transplant out) | - |
| Shiso | Mar 18 | May 6 (Transplant out) | - |
| Stevia | Mar 4 | May 13 (Transplant out) | - |
| Chamomile | Mar 18 | Apr 15 (Transplant out) | Jul 21 |
| Tarragon | Apr 29 | Apr 29 (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 Logan, Ia, 9.3 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.