USDA Hardiness Zone 4B • Midwest • 138 Day Growing Season
| Plant | Start Seeds Indoors | Transplant Outdoors | Direct Sow | First Harvest |
|---|---|---|---|---|
| Acorn Squash | Late April through mid May | Late May through mid June | Mid May through mid June ★ | Early August through late September |
| Ageratum | Late March through mid April | Late May through late June ★ | — | Late July through early September |
| Anaheim Pepper | Late March through mid April ★ | Late May through late June | — | Early August through late September |
| Arugula | Late March through mid April | Late April through early June | Mid April through early August | Late May through early October |
| Asparagus | — | Early to mid May ★ | — | Early May through early October |
| Banana Peppers | Late March through mid April ★ | Late May through late June | — | Early August through mid September |
| Basil | Early to late April | Late May through early July | Late May through mid August | Late June through late September |
| Bay Laurel | Late February through mid March | Late May ★ | — | Late May through early October |
| Beefsteak Tomatoes | Early to late April ★ | Late May through mid June | — | Mid August through late September |
| Beet | — | Mid April through early May | Late April through mid July ★ | Mid June through early October |
| Bell Peppers | Late March through mid April ★ | Late May through late June | — | Early August through mid September |
| Better Boy Tomato | Early to late April ★ | Late May through late June | — | Early August through late September |
| Black-Eyed Susan | Early to late March | Early to late May ★ | Early May through late June | Late July through early October |
| Blackberry | — | Early May through early June ★ | — | Early July through late August |
| Blueberry | — | Early to late May ★ | — | Early August through mid September |
| Bok Choy | Early to late April | Early May through late June | Late April through late July | Early June through early October |
| Borage | — | Late April through late May | Early May through mid July ★ | Early July through early October |
| Brandywine Tomatoes | Early to late April ★ | Late May through mid June | — | Late August through late September |
| Broccoli | Early to late March ★ | Late April through late May | — | Late June through mid August |
| Brussels Sprouts | Late March through mid April ★ | Early to late May | — | Early August through mid September |
| Butternut Squash | Late April through mid May | Late May through early June | Mid May through early June ★ | Late August through late September |
| Cabbage | Early to late March ★ | Late April through late May | — | Early July through late August |
| Calendula | Early to late March | Late April through early June | Late April through late July | Early June through early October |
| Cantaloupe | Late April through mid May | Late May through late June | Late May through late June ★ | Mid August through late September |
| Carrot | — | Late April through late May | Late April through early July ★ | Early July through early October |
| Cauliflower | Early to late March ★ | Late April through late May | — | Early July through late August |
| Cayenne Peppers | Late March through mid April ★ | Late May through late June | — | Early August through mid September |
| Celebrity Tomato | Early to late April ★ | Late May through late June | — | Early August through mid September |
| Celery | Late February through mid March ★ | Early May through early June | — | Early August through late September |
| Chamomile | Early to late March | Late April through late May | Late April through mid July | Late June through early October |
| Cherry Tomatoes | Early to late April ★ | Late May through late June | — | Late July through early September |
| Chives | Late February through mid March | Late April through late May | Mid April through late June | Early July through early October |
| Chrysanthemum | Early to late March | Early May through early June ★ | — | Mid July through early September |
| Cilantro | Early to late April | Early May through late June | Late April through late July | Early June through early October |
| Collard Greens | Early to late April | Early May through early June | Late April through late June | Early July through early October |
| Corn | — | Late May through late June | Mid May through late June ★ | Late July through late September |
| Cosmos | Mid April through early May | Late May through early July | Early May through late July ★ | Late June through late September |
| Cubanelle Pepper | Late March through mid April ★ | Late May through late June | — | Early August through mid September |
| Cucumber | Late April through mid May | Late May through late June | Mid May through mid July ★ | Mid July through late September |
| Dill | Mid April through early May | Mid May through late June | Early May through early August | Mid June through early October |
| Early Girl Tomato | Early to late April ★ | Late May through early July | — | Mid July through mid September |
| Echinacea | Early to late March | Early to late May ★ | Early May through mid June | Early August through early October |
| Eggplant | Late March through mid April ★ | Late May through late June | — | Early August through late September |
| Fennel | — | Early May through early June | Early May through early July ★ | Mid July through early October |
| Feverfew | Early to late March | Early to late May | Early May through early July | Mid July through early October |
| French Marigold | Early to late April | Late May through early July | Early May through late July | Late June through late September |
| Garlic | — | Early to late August | — | Late March through mid May |
| Geranium | Late February through mid March | Late May through late June ★ | — | Early August through mid September |
| Ghost Pepper | Early to late March ★ | Late May through early June | — | Late September |
| Grape Tomatoes | Early to late April ★ | Late May through late June | — | Late July through early September |
| Green Beans | — | Mid May through mid June | Mid May through mid July ★ | Mid July through late September |
| Green Onions | — | Mid April through early May | Mid April through mid July ★ | Mid June through early October |
| Green Zebra Tomato | Early to late April ★ | Late May through late June | — | Early August through late September |
| Habanero Peppers | Mid March through early April ★ | Late May through mid June | — | Late August through late September |
| Heirloom Tomatoes | Early to late April ★ | Late May through late June | — | Mid August through late September |
| Iceberg Lettuce | Late March through mid April | Late April through late May | Mid April through early July | Late June through early October |
| Jalapeño Peppers | Late March through mid April ★ | Late May through late June | — | Early August through late September |
| Kale | Late March through mid April | Late April through late May | Mid April through mid July | Early June through early October |
| Lavender | Early to late March | Late May through mid June ★ | — | Late August through early October |
| Lemon Balm | Late March through mid April | Early May through early June | Early May through early July | Mid July through early October |
| Lettuce | Late March through mid April | Late April through early June | Mid April through late July | Late May through early October |
| Lobelia | Early to late March | Late May through late June ★ | — | Late July through mid September |
| Mint | Early to late March | Early May through early June ★ | — | Early July through late August |
| Mustard Greens | Late March through mid April | Late April through early June | Mid April through late July | Late May through early October |
| Nasturtium | Mid April through early May | Mid May through mid June | Mid May through mid July ★ | Mid July through late September |
| Onion | Early February through early March | Late April through mid May | Mid April through early June | Late July through early October |
| Oregano | Early to late March | Early May through late June ★ | Early May through late July | Late June through early October |
| Parsley | Late February through mid March | Late April through late May | Late April through early July | Early July through early October |
| Peas | — | Mid April through early May | Late March through mid July ★ | Late May through early October |
| Pepper | Late March through mid April ★ | Late May through late June | — | Late July through mid September |
| Pepperoncini | Late March through mid April ★ | Late May through late June | — | Early August through late September |
| Petunia | Early to late March | Late May through late June ★ | — | Late July through early September |
| Poblano Peppers | Late March through mid April ★ | Late May through late June | — | Mid August through late September |
| Potato | — | Late April through mid May | Late April through mid June ★ | Late July through early October |
| Pumpkin | Late April through mid May | Late May through early June | Mid May through early June ★ | Late August through late September |
| Radish | — | Mid April through late May | Mid April through mid August ★ | Early May through early October |
| Raspberry | — | Early May through early June ★ | — | Early July through late August |
| Roma Tomatoes | Early to late April ★ | Late May through late June | — | Early August through late September |
| Romaine Lettuce | Late March through mid April | Late April through late May | Mid April through early July | Mid June through early October |
| Rosemary | Late February through mid March | Late May through mid June ★ | — | Late August through early October |
| Sage | Late March through mid April | Early May through early June ★ | Early May through late June | Late July through early October |
| San Marzano Tomatoes | Early to late April ★ | Late May through late June | — | Mid August through late September |
| Serrano Peppers | Late March through mid April ★ | Late May through late June | — | Mid August through late September |
| Shishito Pepper | Late March through mid April ★ | Late May through late June | — | Late July through early September |
| Snap Peas | — | Mid April through early May | Late March through mid July ★ | Late May through early October |
| Snow Peas | — | Mid April through early May | Late March through mid July ★ | Late May through early October |
| Spaghetti Squash | Late April through mid May | Late May through early June | Mid May through early June ★ | Mid August through late September |
| Spinach | Early to late March | Mid April through late May | Late March through early August | Early May through early October |
| Squash | Late April through mid May | Late May through mid June | Mid May through mid June ★ | Early August through late September |
| Strawberry | — | Late April through mid May ★ | — | Late July through early September |
| Sun Gold Tomato | Early to late April ★ | Late May through late June | — | Mid July through early September |
| Sunflower | Mid April through early May | Mid May through mid June | Early May through late June ★ | Late July through late September |
| Sweet Alyssum | Early to late March | Late April through early June | Late April through late July | Early June through early October |
| Sweet Peppers | Late March through mid April ★ | Late May through late June | — | Late July through mid September |
| Sweet Potato | Late March through mid April | Late May through early June ★ | — | Early to late September |
| Swiss Chard | Early to late April | Early May through early June | Late April through mid July | Mid June through early October |
| Tansy | Early to late March | Late April through late May | Late April through late June | Early July through early October |
| Thai Chili | Late March through mid April ★ | Late May through late June | — | Mid August through late September |
| Thyme | Early to late March | Early May through early June ★ | Early May through early July | Mid July through early October |
| Tomato | Early to late April ★ | Late May through late June | — | Early August through mid September |
| Watermelon | Late April through mid May | Late May through mid June | Late May through mid June ★ | Mid August through late September |
| Yarrow | Late February through mid March | Late April through late May ★ | Early May through early July | Mid July through early October |
| Yellow Squash | Late April through mid May | Late May through early July | Mid May through late July ★ | Early July through late September |
| Zinnia | Mid April through early May | Late May through late June | Mid May through mid July | Mid July through late September |
| Zucchini | Late April through mid May | Late May through early July | Mid May through late July ★ | Early July through late September |