Planting Calendar for ZIP 48721
Based on your local frost dates - last spring frost around May 8, first fall frost around Oct 16 - here is when to plant 79 common crops near ZIP 48721.
Last spring frost
May 8
First fall frost
Oct 16
Hardiness zone
6a
Vegetables
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Tomatoes | Mar 27 | May 15 (Transplant out) | - |
| Peppers | Mar 13 | May 22 (Transplant out) | - |
| Cucumbers | Apr 17 | May 15 (Transplant out) | Aug 8 |
| Zucchini | Apr 17 | May 15 (Transplant out) | Aug 13 |
| Summer Squash | Apr 17 | May 15 (Transplant out) | Aug 11 |
| Winter Squash | Apr 17 | May 15 (Transplant out) | - |
| Pumpkins | Apr 17 | May 15 (Transplant out) | - |
| Green Beans | - | May 8 (Direct sow) | Aug 8 |
| Sweet Corn | - | May 15 (Direct sow) | - |
| Melons | Apr 17 | May 22 (Transplant out) | - |
| Watermelon | Apr 17 | May 22 (Transplant out) | - |
| Okra | - | May 22 (Direct sow) | - |
| Eggplant | Mar 13 | May 22 (Transplant out) | - |
| Lettuce | Apr 10 | Apr 10 (Transplant out) | Aug 13 |
| Spinach | - | Mar 27 (Direct sow) | Aug 18 |
| Kale | Mar 27 | Apr 17 (Transplant out) | Aug 8 |
| Peas | - | Mar 27 (Direct sow) | Aug 3 |
| Carrots | - | Apr 17 (Direct sow) | Jul 24 |
| Beets | - | Apr 10 (Direct sow) | Aug 8 |
| Radishes | - | Apr 10 (Direct sow) | Sep 4 |
| Broccoli | Mar 27 | Apr 24 (Transplant out) | Jul 29 |
| Cauliflower | Mar 27 | Apr 24 (Transplant out) | Jul 24 |
| Cabbage | Mar 27 | Apr 17 (Transplant out) | Jul 24 |
| Onions | Feb 27 | Apr 10 (Transplant out) | - |
| Potatoes | - | Apr 24 (Direct sow) | - |
| Swiss Chard | Apr 10 | Apr 24 (Transplant out) | Aug 8 |
| Sweet Potatoes | - | May 29 (Direct sow) | - |
| Brussels Sprouts | Mar 27 | Apr 24 (Transplant out) | Jun 24 |
| Celery | Feb 27 | May 15 (Transplant out) | - |
| Leeks | Feb 27 | Apr 24 (Transplant out) | Jun 4 |
| Turnips | - | Apr 24 (Direct sow) | Aug 13 |
| Rutabaga | - | May 8 (Direct sow) | Jun 29 |
| Parsnips | - | Apr 24 (Direct sow) | Jun 4 |
| Kohlrabi | Apr 10 | Apr 24 (Transplant out) | Aug 8 |
| Collard Greens | Mar 27 | Apr 24 (Transplant out) | Jul 29 |
| Mustard Greens | - | Apr 24 (Direct sow) | Aug 18 |
| Arugula | - | Apr 24 (Direct sow) | Aug 23 |
| Bok Choy | Apr 10 | Apr 24 (Transplant out) | Aug 13 |
| Green Onions | - | Apr 24 (Direct sow) | Aug 3 |
| Tomatillos | Mar 27 | May 15 (Transplant out) | - |
| Fennel | Apr 10 | Apr 24 (Transplant out) | Jul 14 |
| Popcorn | May 8 | May 22 (Transplant out) | - |
| Black-Eyed Peas | May 8 | May 22 (Transplant out) | Jul 14 |
| Lima Beans | May 8 | May 22 (Transplant out) | - |
| Edamame | May 8 | May 22 (Transplant out) | - |
| Peanuts | May 8 | May 22 (Transplant out) | - |
| Globe Artichoke | Mar 13 | Apr 24 (Transplant out) | Jul 4 |
| Horseradish | May 8 | Apr 24 (Transplant out) | - |
| Ground Cherries | Mar 27 | May 22 (Transplant out) | - |
| Radicchio | Apr 3 | Apr 24 (Transplant out) | Jul 24 |
| Endive | Apr 3 | Apr 24 (Transplant out) | Jul 4 |
| Watercress | Apr 17 | Apr 24 (Transplant out) | Aug 3 |
| Sorrel | Mar 27 | Apr 17 (Transplant out) | Aug 3 |
| Sunchokes | May 8 | Apr 24 (Transplant out) | - |
| Malabar Spinach | Mar 27 | May 22 (Transplant out) | - |
| Amaranth Greens | Apr 17 | May 22 (Transplant out) | Aug 18 |
| Luffa Gourd | Mar 27 | May 22 (Transplant out) | - |
| New Zealand Spinach | Apr 10 | May 22 (Transplant out) | - |
| Fava Beans | May 8 | Apr 10 (Transplant out) | Jul 9 |
| Chayote | Apr 10 | May 22 (Transplant out) | - |
| Corn Salad | May 8 | Apr 10 (Transplant out) | Aug 3 |
| Bitter Melon | Apr 10 | May 22 (Transplant out) | - |
| Cardoon | Mar 27 | May 8 (Transplant out) | - |
Herbs
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Basil | Mar 27 | May 15 (Transplant out) | - |
| Cilantro | - | Apr 24 (Direct sow) | Aug 13 |
| Parsley | Mar 13 | May 22 (Transplant out) | Jul 19 |
| Dill | - | May 15 (Direct sow) | Aug 3 |
| Lemon Balm | Mar 27 | May 8 (Transplant out) | - |
| Borage | May 8 | May 8 (Transplant out) | Aug 8 |
| Chervil | May 8 | Apr 17 (Transplant out) | Aug 8 |
| Lemongrass | Mar 13 | May 22 (Transplant out) | - |
| Summer Savory | Mar 27 | May 8 (Transplant out) | - |
| Marjoram | Mar 27 | May 15 (Transplant out) | - |
| Lovage | Mar 27 | May 8 (Transplant out) | Jul 4 |
| Anise Hyssop | Mar 13 | May 8 (Transplant out) | - |
| Shiso | Mar 27 | May 15 (Transplant out) | - |
| Stevia | Mar 13 | May 22 (Transplant out) | - |
| Chamomile | Mar 27 | Apr 24 (Transplant out) | Jul 29 |
| Tarragon | May 8 | May 8 (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 Harrisville 2Nne, Mi, 8.3 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.