Planting calendar
Zone 4 planting calendar
In USDA zone 4, the average last spring frost is around May 10 and the first fall frost around September 21. Here's when to start seeds indoors and when to sow or transplant each crop outside.
| Crop | Start seeds indoors | Sow / transplant outside |
|---|---|---|
| Tomatoes | March 29 | May 17 |
| Peppers | March 15 | May 24 |
| Eggplant | March 15 | May 24 |
| Broccoli | April 5 | April 26 |
| Cabbage | April 5 | April 26 |
| Bush beans | — | May 17 |
| Sweet corn | — | May 17 |
| Cucumber | — | May 17 |
| Squash & zucchini | — | May 17 |
| Carrots | — | April 19 |
| Lettuce | — | April 12 |
| Peas | — | March 29 |
| Radishes | — | April 12 |
| Spinach | — | March 29 |
| Kale | — | April 12 |
Anchored to an approximate zone 4 last frost (May 10). A guide — confirm locally.
FAQ
When is the last frost in zone 4?
Zone 4 has an approximate average last spring frost around May 10 and first fall frost around September 21. Your exact dates vary locally — use these as the anchor for planting.
What can I plant in zone 4 in spring?
Cool crops (peas, lettuce, spinach, kale, radishes, carrots) go in weeks before the last frost; warm crops (tomatoes, peppers, beans, squash, corn, cucumber) after it. The table gives the date for each.
A planting guide, not a guarantee. Zone 4 dates anchor to an approximate average last frost and will shift with your microclimate and the season. Check the local forecast before planting tender crops.