April is the pivot month in zone 6: the average last frost lands around Apr 10. Hardy crops go out all month; tender ones wait for the far side of that date.
| 🌈 Swiss Chard | Mar 27 – Apr 10 | 50–60 days to maturity |
| 🥦 Broccoli | Mar 20 – Apr 3 | 60–75 days to maturity |
| 🥦 Cauliflower | Mar 27 – Apr 10 | 60–80 days to maturity |
| 🥬 Brussels Sprouts | Apr 10 – Apr 24 | 90–110 days to maturity |
| 🥬 Celery | Apr 10 – Apr 24 | 100–120 days to maturity |
| 🍅 Tomatoes | Apr 17 – Apr 24 | 60–85 days to maturity |
| 🫑 Peppers | Apr 24 – May 1 | 60–90 days to maturity |
| 🍆 Eggplant | Apr 24 – May 1 | 65–80 days to maturity |
| 🍏 Tomatillos | Apr 17 – Apr 24 | 70–80 days to maturity |
| 🥒 Cucumbers | Apr 17 – Apr 24 | 50–70 days to maturity |
| 🥒 Zucchini | Apr 17 – Apr 24 | 45–60 days to maturity |
| 🎃 Winter Squash | Apr 17 – Apr 24 | 85–110 days to maturity |
| 🎃 Pumpkins | Apr 17 – Apr 24 | 90–110 days to maturity |
| 🍉 Watermelon | Apr 24 – May 1 | 75–95 days to maturity |
| 🍈 Cantaloupe | Apr 24 – May 1 | 75–90 days to maturity |
| 🍠 Sweet Potatoes | Apr 24 – May 8 | 90–120 days to maturity |
| 🌿 Basil | Apr 17 – Apr 24 | 30–60 days to maturity |
| 🌿 Parsley | Mar 27 – Apr 10 | 70–90 days to maturity |
| 🌱 Chives | Mar 27 – Apr 10 | 75–85 days to maturity |
| 🌿 Thyme | Apr 10 – Apr 24 | 90–120 days to maturity |
| 🌿 Oregano | Apr 10 – Apr 24 | 80–90 days to maturity |
| 🌸 Zinnias | Apr 17 – Apr 24 | 60–70 days to maturity |
| 🏵️ Marigolds | Apr 17 – Apr 24 | 50–60 days to maturity |
| 🥬 Lettuce | Mar 13 – Apr 10 | 45–60 days to maturity |
| 🌈 Swiss Chard | Mar 27 – Apr 10 | 50–60 days to maturity |
| 🍃 Collard Greens | Mar 27 – Apr 10 | 60–75 days to maturity |
| 🥕 Carrots | Mar 20 – Apr 10 | 60–75 days to maturity |
| 🥕 Parsnips | Mar 20 – Apr 10 | 100–120 days to maturity |
| 🥬 Bok Choy | Mar 20 – Apr 3 | 45–55 days to maturity |
| 🥒 Cucumbers | Apr 17 – Apr 24 | 50–70 days to maturity |
| 🥒 Zucchini | Apr 17 – Apr 24 | 45–60 days to maturity |
| 🎃 Winter Squash | Apr 17 – Apr 24 | 85–110 days to maturity |
| 🎃 Pumpkins | Apr 17 – Apr 24 | 90–110 days to maturity |
| 🍉 Watermelon | Apr 24 – May 1 | 75–95 days to maturity |
| 🍈 Cantaloupe | Apr 24 – May 1 | 75–90 days to maturity |
| 🌽 Sweet Corn | Apr 17 – Apr 24 | 65–90 days to maturity |
| 🫘 Green Beans (Bush) | Apr 17 – Apr 24 | 50–60 days to maturity |
| 🫘 Pole Beans | Apr 17 – Apr 24 | 60–70 days to maturity |
| 🌶️ Okra | Apr 24 – May 8 | 55–65 days to maturity |
| 🌿 Basil | Apr 24 – May 1 | 30–60 days to maturity |
| 🌿 Cilantro | Mar 20 – Apr 3 | 45–55 days to maturity |
| 🌿 Parsley | Mar 27 – Apr 10 | 70–90 days to maturity |
| 🌾 Dill | Mar 27 – Apr 10 | 40–55 days to maturity |
| 🌱 Chives | Mar 27 – Apr 10 | 75–85 days to maturity |
| 🌻 Sunflowers | Apr 17 – Apr 24 | 70–100 days to maturity |
| 🌸 Zinnias | Apr 17 – Apr 24 | 60–70 days to maturity |
| 🏵️ Marigolds | Apr 17 – Apr 24 | 50–60 days to maturity |
| 🌺 Nasturtiums | Apr 17 – Apr 24 | 55–65 days to maturity |
Windows use zone 6's typical frost dates (Apr 10 / Oct 22). For your own city's dates, run the frost lookup — the planting calendar then localizes everything automatically.
36 crops can go in the ground: swiss chard, broccoli, cauliflower, brussels sprouts, celery, tomatoes, peppers, eggplant, and 28 more. Exact windows are in the tables above — early and late in the month can differ by a full frost date.
Yes — April is tomato transplanting time in zone 6 (Apr 17 – Apr 24).