Kulm, ND frost dates
Last spring frostMay 7median date
First fall frostOct 2median date
Growing season148 daysfrost-free
Hardiness zone4bZone 4b
How Kulm compares
- In 8 years out of 10, the last spring frost in Kulm falls between April 24 and May 20, a 26-day window. The first fall frost falls between September 21 and October 16.
- The median last frost is 5 days earlier than the North Dakota median of May 12.
- Its 148-day growing season is longer than 88% of the 372 North Dakota places with a regular frost season (state median 139 days).
- The last frost is typical for zone 4b, where the median is May 8.
- The weather station records an average of 177 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 24 |
| 50% (median) | May 7 |
| 10% (safe for tender plants) | May 20 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 21 |
| 50% (median) | October 2 |
| 90% (late) | October 16 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Kulm, ND
Kulm, ND frost dates — last frost May 7, first frost Oct 2, zone 4b. whenisthelastfrost.com
Crop
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Start indoors: Feb 12 to Feb 26Transplant outside: Apr 9 to Apr 23
Start indoors: Feb 26 to Mar 12Transplant outside: May 21 to Jun 4
Start indoors: Feb 26 to Mar 12Transplant outside: May 21 to Jun 4
Start indoors: Mar 12 to Mar 26Transplant outside: May 14 to May 28
Start indoors: Mar 12 to Mar 26Transplant outside: Apr 16 to Apr 30Sow outdoors: Apr 9 to May 14Plant for fall: Aug 7 to Sep 4
Start indoors: Mar 12 to Mar 26Transplant outside: Apr 9 to Apr 23Sow outdoors: Apr 9 to Apr 23Plant for fall: Jul 24 to Aug 14
Start indoors: Mar 12 to Mar 26Transplant outside: Apr 23 to May 7Plant for fall: Jun 26 to Jul 17
Start indoors: Mar 12 to Mar 26Transplant outside: Apr 16 to Apr 30Plant for fall: Jun 26 to Jul 17
Start indoors: Mar 12 to Mar 26Transplant outside: Apr 23 to May 7Plant for fall: Jun 26 to Jul 17
Start indoors: Mar 26 to Apr 9Transplant outside: May 28 to Jun 11Sow outdoors: May 28 to Jun 11
Start indoors: Mar 26 to Apr 9Transplant outside: May 14 to May 28
Sow outdoors: Mar 26 to Apr 16Plant for fall: Jul 10 to Jul 31
Sow outdoors: Mar 26 to Apr 16Plant for fall: Aug 7 to Aug 28
Sow outdoors: Apr 2 to May 14Plant for fall: Aug 21 to Sep 11
Start indoors: Apr 9 to Apr 16Transplant outside: May 21 to May 28Sow outdoors: May 14 to May 28Plant for fall: Jul 17 to Jul 31
Start indoors: Apr 9 to Apr 16Sow outdoors: May 14 to May 28Plant for fall: Jul 24 to Aug 7
Start indoors: Apr 9 to Apr 16Sow outdoors: May 14 to May 28
Start indoors: Apr 9 to Apr 16Transplant outside: May 21 to Jun 4
Sow outdoors: Apr 16 to May 14Plant for fall: Jul 10 to Jul 24
Sow outdoors: Apr 16 to May 14Plant for fall: Jul 24 to Aug 7
Sow outdoors: Apr 16 to May 7
Sow outdoors: Apr 23 to May 21Plant for fall: Jul 24 to Aug 7
Sow outdoors: Apr 23 to May 14Plant for fall: Aug 7 to Aug 28
Sow outdoors: May 14 to Jun 4Plant for fall: Jul 17 to Jul 31
Sow outdoors: May 14 to May 28
Transplant outside: May 21 to Jun 11
Plant for fall: Sep 18 to Oct 23
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Kulm, ND
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 12 – Feb 26 | Apr 9 – Apr 23 | — | — |
| Peppers | Feb 26 – Mar 12 | May 21 – Jun 4 | — | — |
| Eggplant | Feb 26 – Mar 12 | May 21 – Jun 4 | — | — |
| Tomatoes | Mar 12 – Mar 26 | May 14 – May 28 | — | — |
| Lettuce | Mar 12 – Mar 26 | Apr 16 – Apr 30 | Apr 9 – May 14 | Aug 7 – Sep 4 |
| Kale | Mar 12 – Mar 26 | Apr 9 – Apr 23 | Apr 9 – Apr 23 | Jul 24 – Aug 14 |
| Broccoli | Mar 12 – Mar 26 | Apr 23 – May 7 | — | Jun 26 – Jul 17 |
| Cabbage | Mar 12 – Mar 26 | Apr 16 – Apr 30 | — | Jun 26 – Jul 17 |
| Cauliflower | Mar 12 – Mar 26 | Apr 23 – May 7 | — | Jun 26 – Jul 17 |
| Okra | Mar 26 – Apr 9 | May 28 – Jun 11 | May 28 – Jun 11 | — |
| Basil | Mar 26 – Apr 9 | May 14 – May 28 | — | — |
| Peas | — | — | Mar 26 – Apr 16 | Jul 10 – Jul 31 |
| Spinach | — | — | Mar 26 – Apr 16 | Aug 7 – Aug 28 |
| Radishes | — | — | Apr 2 – May 14 | Aug 21 – Sep 11 |
| Cucumbers | Apr 9 – Apr 16 | May 21 – May 28 | May 14 – May 28 | Jul 17 – Jul 31 |
| Zucchini & Summer Squash | Apr 9 – Apr 16 | — | May 14 – May 28 | Jul 24 – Aug 7 |
| Winter Squash & Pumpkins | Apr 9 – Apr 16 | — | May 14 – May 28 | — |
| Melons & Watermelon | Apr 9 – Apr 16 | May 21 – Jun 4 | — | — |
| Carrots | — | — | Apr 16 – May 14 | Jul 10 – Jul 24 |
| Beets | — | — | Apr 16 – May 14 | Jul 24 – Aug 7 |
| Potatoes | — | — | Apr 16 – May 7 | — |
| Swiss Chard | — | — | Apr 23 – May 21 | Jul 24 – Aug 7 |
| Cilantro | — | — | Apr 23 – May 14 | Aug 7 – Aug 28 |
| Green Beans | — | — | May 14 – Jun 4 | Jul 17 – Jul 31 |
| Sweet Corn | — | — | May 14 – May 28 | — |
| Sweet Potatoes | — | May 21 – Jun 11 | — | — |
| Garlic | — | — | — | Sep 18 – Oct 23 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Edgeley 3wnw, ND weather station, 15 km away (elevation 1,624 ft (495 m)).
Frost dates near Kulm
- Edgeley May 7 · Oct 2
- Fredonia May 6 · Oct 4
- Jud May 7 · Oct 2
- Lehr May 13 · Sep 27
- Forbes May 4 · Oct 2
- Berlin May 10 · Sep 28
- Gackle May 6 · Oct 4
- Ashley May 13 · Sep 28
- Fullerton May 9 · Sep 28
- Dickey May 10 · Sep 28
Frequently asked questions
When is the last frost in Kulm, ND?
The median last spring frost in Kulm, ND is May 7. There is still about a 10% chance of frost after May 20, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Kulm, ND?
The median first fall frost is October 2, with about a 10% chance of frost before September 21.
How long is the growing season in Kulm, ND?
About 148 days between the median last spring frost and first fall frost.
What planting zone is Kulm, ND?
Kulm, ND is in USDA hardiness zone 4b.