USDA Zone 6a Planting Calendar (2026)
Zone 6a (-10 to -5°F) has an average last spring frost on Apr 20 and first fall frost on Oct 15 — about 178 growing days. Typical areas: St. Louis MO, Philadelphia PA.
| Vegetable | Start Indoors | Sow / Transplant | Harvest From |
|---|---|---|---|
| Beet | — | Mar 23 | May 17 |
| 🥦 Broccoli | Mar 16 | Apr 6 | Jun 10 |
| 🫘 Bush Beans | — | Apr 27 | Jun 21 |
| 🥬 Cabbage | Mar 9 | Apr 6 | Jun 25 |
| 🥕 Carrot | — | Mar 30 | Jun 8 |
| 🥦 Cauliflower | Mar 9 | Apr 6 | Jun 20 |
| 🌽 Corn | — | May 4 | Jul 23 |
| 🥒 Cucumber | Mar 30 | May 4 | Jun 28 |
| 🧄 Garlic | — | Oct 5 | Jun 2 |
| 🥬 Kale | Mar 16 | Mar 30 | May 24 |
| 🥬 Lettuce | Mar 23 | Mar 30 | May 14 |
| 🧅 Onion | Feb 9 | Mar 23 | Jul 1 |
| 🟢 Peas | — | Mar 9 | May 8 |
| 🫑 Pepper | Feb 23 | May 4 | Jul 13 |
| 🥔 Potato | — | Apr 6 | Jul 5 |
| 🌶️ Radish | — | Mar 23 | Apr 20 |
| 🍃 Spinach | — | Mar 16 | Apr 25 |
| 🎃 Summer Squash | Mar 30 | Apr 27 | Jun 16 |
| 🍅 Tomato | Mar 9 | Apr 27 | Jul 11 |
| 🥒 Zucchini | Mar 30 | Apr 27 | Jun 16 |