USDA Hardiness Zone 3A • Great Plains • 108 Day Growing Season
| Plant | Start Seeds Indoors | Transplant Outdoors | Direct Sow | First Harvest |
|---|---|---|---|---|
| Acorn Squash | Mid May through early June | Early to mid June | Early June ★ | Late August through early September |
| Ageratum | Early to late April | Early to late June ★ | — | Early August through early September |
| Anaheim Pepper | Early to late April ★ | Early to mid June | — | Late August through early September |
| Arugula | Mid April through early May | Mid May through late June | Late April through mid July | Early June through mid September |
| Asparagus | — | Late May through early June ★ | — | Late May through late September |
| Banana Peppers | Early to late April ★ | Early to mid June | — | Mid August through early September |
| Basil | Mid April through mid May | Early June through mid July | Early June through late July | Early July through early September |
| Bay Laurel | Early to late March | Early to mid June ★ | — | Early June through late September |
| Beefsteak Tomatoes | Mid April through mid May ★ | Early to mid June | — | Early September |
| Beet | — | Late April through late May | Mid May through early July ★ | Early July through mid September |
| Bell Peppers | Early to late April ★ | Early to mid June | — | Mid August through early September |
| Better Boy Tomato | Mid April through mid May ★ | Early to mid June | — | Mid August through early September |
| Black-Eyed Susan | Mid March through early April | Mid May through mid June ★ | Late May through mid June | Early August through mid September |
| Blackberry | — | Late May through late June ★ | — | Late July through mid September |
| Blueberry | — | Late May ★ | — | Late August through mid September |
| Bok Choy | Mid April through mid May | Late May through early July | Mid May through mid July | Late June through mid September |
| Borage | — | Mid May through early June | Late May through early July ★ | Mid July through mid September |
| Brandywine Tomatoes | Mid April through mid May ★ | Early to mid June | — | Early September |
| Broccoli | Late March through mid April ★ | Mid May through early June | — | Early July through late August |
| Brussels Sprouts | Early to late April ★ | Late May | — | Late August through mid September |
| Butternut Squash | Mid May through early June | Early to mid June | — | Mid to early September |
| Cabbage | Late March through mid April ★ | Mid May through early June | — | Mid July through early September |
| Calendula | Late March through mid April | Mid May through late June | Mid May through mid July | Late June through mid September |
| Cantaloupe | Mid to late May | Early June | Early June ★ | Late August through early September |
| Carrot | — | Mid May through early June | Mid May through mid June ★ | Mid July through mid September |
| Cauliflower | Late March through mid April ★ | Mid May through early June | — | Mid July through early September |
| Cayenne Peppers | Early to late April ★ | Early to mid June | — | Mid August through early September |
| Celebrity Tomato | Mid April through mid May ★ | Early to mid June | — | Mid August through early September |
| Celery | Early to late March ★ | Late May through early June | — | Mid August through mid September |
| Chamomile | Late March through mid April | Mid May through early June | Mid May through late June | Early July through mid September |
| Cherry Tomatoes | Mid April through mid May ★ | Early to late June | — | Early August through early September |
| Chives | Early to late March | Mid May through early June | Late April through early June | Mid July through mid September |
| Chrysanthemum | Late March through mid April | Late May through mid June ★ | — | Early August through mid September |
| Cilantro | Mid April through mid May | Late May through early July | Mid May through mid July | Late June through mid September |
| Collard Greens | Mid April through mid May | Late May through mid June | Mid May through mid June | Late July through mid September |
| Corn | — | Early to mid June | Early to mid June ★ | Mid August through early September |
| Cosmos | Early to late May | Early June through early July | Late May through early July ★ | Mid July through early September |
| Cubanelle Pepper | Early to late April ★ | Early to mid June | — | Mid August through early September |
| Cucumber | Mid May through early June | Early June through early July | Early June through early July ★ | Late July through early September |
| Dill | Late April through mid May | Early June through mid July | Late May through mid July | Early July through mid September |
| Early Girl Tomato | Mid April through mid May ★ | Early June through early July | — | Late July through early September |
| Echinacea | Late March through early April | Late May ★ | Late May | Late August through mid September |
| Eggplant | Mid to late April ★ | Mid June | — | Late August through early September |
| Fennel | — | Late May through late June | Late May through late June ★ | Late July through mid September |
| Feverfew | Mid March through early April | Mid May through mid June | Late May through mid June | Early August through mid September |
| French Marigold | Mid April through mid May | Early June through early July | Late May through early July | Mid July through early September |
| Garlic | — | Mid August through early September | — | Mid April through late May |
| Geranium | Early to late March | Early to mid June ★ | — | Mid August through early September |
| Ghost Pepper | Mid March through early April ★ | Mid to late June | — | Mid October through early September |
| Grape Tomatoes | Mid April through mid May ★ | Early to late June | — | Early August through early September |
| Green Beans | — | Early to late June | Early June through early July ★ | Late July through early September |
| Green Onions | — | Late April through late May | Late April through late June ★ | Late June through mid September |
| Green Zebra Tomato | Mid April through early May ★ | Early to mid June | — | Late August through early September |
| Habanero Peppers | Late March through mid April ★ | Mid to late June | — | Mid to early September |
| Heirloom Tomatoes | Mid April through early May ★ | Early June | — | Late August through early September |
| Iceberg Lettuce | Early to late April | Mid May through early June | Late April through mid June | Early July through mid September |
| Jalapeño Peppers | Early to late April ★ | Early to mid June | — | Late August through early September |
| Kale | Early to late April | Mid May through early June | Late April through early July | Late June through mid September |
| Lavender | Late March through mid April | Early to mid June ★ | — | Early to late September |
| Lemon Balm | Early to late April | Late May through mid June | Late May through mid June | Early August through mid September |
| Lettuce | Early to late April | Mid May through late June | Late April through mid July | Mid June through mid September |
| Lobelia | Late March through mid April | Early to late June ★ | — | Mid August through early September |
| Mint | Late March through mid April | Late May through late June ★ | — | Late July through mid September |
| Mustard Greens | Mid April through early May | Mid May through late June | Late April through mid July | Mid June through mid September |
| Nasturtium | Late April through mid May | Early to late June | Early June through early July ★ | Late July through early September |
| Onion | Late February through mid March | Mid May | Late April through mid May | Early August through mid September |
| Oregano | Late March through mid April | Late May through early July ★ | Late May through mid July | Early July through mid September |
| Parsley | Early to late March | Mid May through early June | Mid May through mid June | Mid July through mid September |
| Peas | — | Late April through late May | Mid April through late June ★ | Mid June through mid September |
| Pepper | Early to late April ★ | Early to late June | — | Mid August through early September |
| Pepperoncini | Early to late April ★ | Early to mid June | — | Mid August through early September |
| Petunia | Late March through mid April | Early to late June ★ | — | Early August through early September |
| Poblano Peppers | Early to mid April ★ | Early June | — | Late August through early September |
| Potato | — | Mid to late May | Mid to late May ★ | Early August through mid September |
| Pumpkin | Mid May through early June | Early to mid June | — | Mid to early September |
| Radish | — | Late April through early June | Late April through early August ★ | Late May through mid September |
| Raspberry | — | Late May through late June ★ | — | Late July through mid September |
| Roma Tomatoes | Mid April through early May ★ | Early to mid June | — | Late August through early September |
| Romaine Lettuce | Early to late April | Mid May through early June | Late April through late June | Early July through mid September |
| Rosemary | Early to late March | Early to mid June ★ | — | Early to late September |
| Sage | Early to late April | Late May through mid June ★ | Late May through mid June | Early August through mid September |
| San Marzano Tomatoes | Mid April through early May ★ | Early June | — | Late August through early September |
| Serrano Peppers | Early to mid April ★ | Early June | — | Late August through early September |
| Shishito Pepper | Early to late April ★ | Early to late June | — | Early August through early September |
| Snap Peas | — | Late April through late May | Mid April through late June ★ | Mid June through mid September |
| Snow Peas | — | Late April through late May | Mid April through early July ★ | Early June through mid September |
| Spaghetti Squash | Mid May through early June | Early to mid June | — | Mid to early September |
| Spinach | Late March through mid April | Late April through early June | Mid April through mid July | Late May through mid September |
| Squash | Mid May through early June | Early to mid June | Early June ★ | Late August through early September |
| Strawberry | — | Mid to late May ★ | — | Early August through mid September |
| Sun Gold Tomato | Mid April through mid May ★ | Early June through early July | — | Early August through early September |
| Sunflower | Early to late May | Early June | Late May through early June ★ | Mid August through early September |
| Sweet Alyssum | Late March through mid April | Mid May through late June | Mid May through mid July | Late June through mid September |
| Sweet Peppers | Early to late April ★ | Early to late June | — | Mid August through early September |
| Sweet Potato | Mid April through early May | Mid to late June ★ | — | Late to early September |
| Swiss Chard | Mid April through mid May | Late May through late June | Mid May through early July | Early July through mid September |
| Tansy | Late March through mid April | Mid May through early June | Mid May through mid June | Late July through mid September |
| Thai Chili | Early to mid April ★ | Early June | — | Late August through early September |
| Thyme | Late March through mid April | Late May through mid June ★ | Late May through mid June | Early August through mid September |
| Tomato | Mid April through mid May ★ | Early to mid June | — | Mid August through early September |
| Watermelon | Mid May through early June | Early to mid June | — | Early September |
| Yarrow | Early to late March | Mid May through early June ★ | Late May through late June | Late July through mid September |
| Yellow Squash | Mid May through early June | Early June through early July | Early June through early July ★ | Late July through early September |
| Zinnia | Early to late May | Early to late June | Early to late June | Late July through early September |
| Zucchini | Mid May through early June | Early June through early July | Early June through early July ★ | Late July through early September |