Planting calendar
Zone 3 planting calendar
In USDA zone 3, the average last spring frost is around May 15 and the first fall frost around September 15. Here's when to start seeds indoors and when to sow or transplant each crop outside.
| Crop | Start seeds indoors | Sow / transplant outside |
|---|---|---|
| Tomatoes | April 3 | May 22 |
| Peppers | March 20 | May 29 |
| Eggplant | March 20 | May 29 |
| Broccoli | April 10 | May 1 |
| Cabbage | April 10 | May 1 |
| Bush beans | — | May 22 |
| Sweet corn | — | May 22 |
| Cucumber | — | May 22 |
| Squash & zucchini | — | May 22 |
| Carrots | — | April 24 |
| Lettuce | — | April 17 |
| Peas | — | April 3 |
| Radishes | — | April 17 |
| Spinach | — | April 3 |
| Kale | — | April 17 |
Anchored to an approximate zone 3 last frost (May 15). A guide — confirm locally.
FAQ
When is the last frost in zone 3?
Zone 3 has an approximate average last spring frost around May 15 and first fall frost around September 15. Your exact dates vary locally — use these as the anchor for planting.
What can I plant in zone 3 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 3 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.