USDA Zone 5b Planting Calendar (2026)
Zone 5b (-15 to -10°F) has an average last spring frost on Apr 25 and first fall frost on Oct 10 — about 168 growing days. Typical areas: Denver CO, Columbus OH.
| Vegetable | Start Indoors | Sow / Transplant | Harvest From |
|---|---|---|---|
| Beet | — | Mar 28 | May 22 |
| 🥦 Broccoli | Mar 21 | Apr 11 | Jun 15 |
| 🫘 Bush Beans | — | May 2 | Jun 26 |
| 🥬 Cabbage | Mar 14 | Apr 11 | Jun 30 |
| 🥕 Carrot | — | Apr 4 | Jun 13 |
| 🥦 Cauliflower | Mar 14 | Apr 11 | Jun 25 |
| 🌽 Corn | — | May 9 | Jul 28 |
| 🥒 Cucumber | Apr 4 | May 9 | Jul 3 |
| 🧄 Garlic | — | Oct 10 | Jun 7 |
| 🥬 Kale | Mar 21 | Apr 4 | May 29 |
| 🥬 Lettuce | Mar 28 | Apr 4 | May 19 |
| 🧅 Onion | Feb 14 | Mar 28 | Jul 6 |
| 🟢 Peas | — | Mar 14 | May 13 |
| 🫑 Pepper | Feb 28 | May 9 | Jul 18 |
| 🥔 Potato | — | Apr 11 | Jul 10 |
| 🌶️ Radish | — | Mar 28 | Apr 25 |
| 🍃 Spinach | — | Mar 21 | Apr 30 |
| 🎃 Summer Squash | Apr 4 | May 2 | Jun 21 |
| 🍅 Tomato | Mar 14 | May 2 | Jul 16 |
| 🥒 Zucchini | Apr 4 | May 2 | Jun 21 |