Zone 3b planting calendar
USDA zone 3b has average winter lows of -35°F to -30°F. Across 223 ZIP codes in this zone, the typical last spring frost is May 17 and the first fall frost is September 24.
Zone dates are an average — get your own
Zone 3b vegetable planting calendar
Crop
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Start indoors: Feb 22 to Mar 8Transplant outside: Apr 19 to May 3
Start indoors: Mar 8 to Mar 22Transplant outside: May 31 to Jun 14
Start indoors: Mar 8 to Mar 22Transplant outside: May 31 to Jun 14
Start indoors: Mar 22 to Apr 5Transplant outside: May 24 to Jun 7
Start indoors: Mar 22 to Apr 5Transplant outside: Apr 26 to May 10Sow outdoors: Apr 19 to May 24Plant for fall: Jul 30 to Aug 27
Start indoors: Mar 22 to Apr 5Transplant outside: Apr 19 to May 3Sow outdoors: Apr 19 to May 3Plant for fall: Jul 16 to Aug 6
Start indoors: Mar 22 to Apr 5Transplant outside: May 3 to May 17Plant for fall: Jun 18 to Jul 9
Start indoors: Mar 22 to Apr 5Transplant outside: Apr 26 to May 10Plant for fall: Jun 18 to Jul 9
Start indoors: Mar 22 to Apr 5Transplant outside: May 3 to May 17Plant for fall: Jun 18 to Jul 9
Start indoors: Apr 5 to Apr 19Transplant outside: Jun 7 to Jun 21Sow outdoors: Jun 7 to Jun 21
Start indoors: Apr 5 to Apr 19Transplant outside: May 24 to Jun 7
Sow outdoors: Apr 5 to Apr 26Plant for fall: Jul 2 to Jul 23
Sow outdoors: Apr 5 to Apr 26Plant for fall: Jul 30 to Aug 20
Sow outdoors: Apr 12 to May 24Plant for fall: Aug 13 to Sep 3
Start indoors: Apr 19 to Apr 26Transplant outside: May 31 to Jun 7Sow outdoors: May 24 to Jun 7Plant for fall: Jul 9 to Jul 23
Start indoors: Apr 19 to Apr 26Sow outdoors: May 24 to Jun 7Plant for fall: Jul 16 to Jul 30
Start indoors: Apr 19 to Apr 26Sow outdoors: May 24 to Jun 7
Start indoors: Apr 19 to Apr 26Transplant outside: May 31 to Jun 14
Sow outdoors: Apr 26 to May 24Plant for fall: Jul 2 to Jul 16
Sow outdoors: Apr 26 to May 24Plant for fall: Jul 16 to Jul 30
Sow outdoors: Apr 26 to May 17
Sow outdoors: May 3 to May 31Plant for fall: Jul 16 to Jul 30
Sow outdoors: May 3 to May 24Plant for fall: Jul 30 to Aug 20
Sow outdoors: May 24 to Jun 14Plant for fall: Jul 9 to Jul 23
Sow outdoors: May 24 to Jun 7
Transplant outside: May 31 to Jun 21
Plant for fall: Sep 10 to Oct 15
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant in zone 3b
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 22 – Mar 8 | Apr 19 – May 3 | — | — |
| Peppers | Mar 8 – Mar 22 | May 31 – Jun 14 | — | — |
| Eggplant | Mar 8 – Mar 22 | May 31 – Jun 14 | — | — |
| Tomatoes | Mar 22 – Apr 5 | May 24 – Jun 7 | — | — |
| Lettuce | Mar 22 – Apr 5 | Apr 26 – May 10 | Apr 19 – May 24 | Jul 30 – Aug 27 |
| Kale | Mar 22 – Apr 5 | Apr 19 – May 3 | Apr 19 – May 3 | Jul 16 – Aug 6 |
| Broccoli | Mar 22 – Apr 5 | May 3 – May 17 | — | Jun 18 – Jul 9 |
| Cabbage | Mar 22 – Apr 5 | Apr 26 – May 10 | — | Jun 18 – Jul 9 |
| Cauliflower | Mar 22 – Apr 5 | May 3 – May 17 | — | Jun 18 – Jul 9 |
| Okra | Apr 5 – Apr 19 | Jun 7 – Jun 21 | Jun 7 – Jun 21 | — |
| Basil | Apr 5 – Apr 19 | May 24 – Jun 7 | — | — |
| Peas | — | — | Apr 5 – Apr 26 | Jul 2 – Jul 23 |
| Spinach | — | — | Apr 5 – Apr 26 | Jul 30 – Aug 20 |
| Radishes | — | — | Apr 12 – May 24 | Aug 13 – Sep 3 |
| Cucumbers | Apr 19 – Apr 26 | May 31 – Jun 7 | May 24 – Jun 7 | Jul 9 – Jul 23 |
| Zucchini & Summer Squash | Apr 19 – Apr 26 | — | May 24 – Jun 7 | Jul 16 – Jul 30 |
| Winter Squash & Pumpkins | Apr 19 – Apr 26 | — | May 24 – Jun 7 | — |
| Melons & Watermelon | Apr 19 – Apr 26 | May 31 – Jun 14 | — | — |
| Carrots | — | — | Apr 26 – May 24 | Jul 2 – Jul 16 |
| Beets | — | — | Apr 26 – May 24 | Jul 16 – Jul 30 |
| Potatoes | — | — | Apr 26 – May 17 | — |
| Swiss Chard | — | — | May 3 – May 31 | Jul 16 – Jul 30 |
| Cilantro | — | — | May 3 – May 24 | Jul 30 – Aug 20 |
| Green Beans | — | — | May 24 – Jun 14 | Jul 9 – Jul 23 |
| Sweet Corn | — | — | May 24 – Jun 7 | — |
| Sweet Potatoes | — | May 31 – Jun 21 | — | — |
| Garlic | — | — | — | Sep 10 – Oct 15 |