Askov, MN frost dates
Last spring frostMay 18median date
First fall frostSep 26median date
Growing season131 daysfrost-free
Hardiness zone4aZone 4a
How Askov compares
- In 8 years out of 10, the last spring frost in Askov falls between May 3 and June 1, a 29-day window. The first fall frost falls between September 12 and October 9.
- The median last frost is 13 days later than the Minnesota median of May 5.
- Its 131-day growing season is longer than 8% of the 801 Minnesota places with a regular frost season (state median 151 days).
- The last frost is 6 days later than the zone 4a median of May 12. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 4a chart.
- The weather station records an average of 191 nights a year at or below 32°F.
- Compared with Duluth, MN, 81 km away, the last frost here is 4 days later than there and the growing season is 20 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 3 |
| 50% (median) | May 18 |
| 10% (safe for tender plants) | June 1 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 12 |
| 50% (median) | September 26 |
| 90% (late) | October 9 |
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 Askov, MN
Askov, MN frost dates — last frost May 18, first frost Sep 26, zone 4a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 23 to Mar 9Transplant outside: Apr 20 to May 4
Start indoors: Mar 9 to Mar 23Transplant outside: Jun 1 to Jun 15
Start indoors: Mar 9 to Mar 23Transplant outside: Jun 1 to Jun 15
Start indoors: Mar 23 to Apr 6Transplant outside: May 25 to Jun 8
Start indoors: Mar 23 to Apr 6Transplant outside: Apr 27 to May 11Sow outdoors: Apr 20 to May 25Plant for fall: Aug 1 to Aug 29
Start indoors: Mar 23 to Apr 6Transplant outside: Apr 20 to May 4Sow outdoors: Apr 20 to May 4Plant for fall: Jul 18 to Aug 8
Start indoors: Mar 23 to Apr 6Transplant outside: May 4 to May 18Plant for fall: Jun 20 to Jul 11
Start indoors: Mar 23 to Apr 6Transplant outside: Apr 27 to May 11Plant for fall: Jun 20 to Jul 11
Start indoors: Mar 23 to Apr 6Transplant outside: May 4 to May 18Plant for fall: Jun 20 to Jul 11
Start indoors: Apr 6 to Apr 20Transplant outside: Jun 8 to Jun 22Sow outdoors: Jun 8 to Jun 22
Start indoors: Apr 6 to Apr 20Transplant outside: May 25 to Jun 8
Sow outdoors: Apr 6 to Apr 27Plant for fall: Jul 4 to Jul 25
Sow outdoors: Apr 6 to Apr 27Plant for fall: Aug 1 to Aug 22
Sow outdoors: Apr 13 to May 25Plant for fall: Aug 15 to Sep 5
Start indoors: Apr 20 to Apr 27Transplant outside: Jun 1 to Jun 8Sow outdoors: May 25 to Jun 8Plant for fall: Jul 11 to Jul 25
Start indoors: Apr 20 to Apr 27Sow outdoors: May 25 to Jun 8Plant for fall: Jul 18 to Aug 1
Start indoors: Apr 20 to Apr 27Sow outdoors: May 25 to Jun 8
Start indoors: Apr 20 to Apr 27Transplant outside: Jun 1 to Jun 15
Sow outdoors: Apr 27 to May 25Plant for fall: Jul 4 to Jul 18
Sow outdoors: Apr 27 to May 25Plant for fall: Jul 18 to Aug 1
Sow outdoors: Apr 27 to May 18
Sow outdoors: May 4 to Jun 1Plant for fall: Jul 18 to Aug 1
Sow outdoors: May 4 to May 25Plant for fall: Aug 1 to Aug 22
Sow outdoors: May 25 to Jun 15Plant for fall: Jul 11 to Jul 25
Sow outdoors: May 25 to Jun 8
Transplant outside: Jun 1 to Jun 22
Plant for fall: Sep 12 to Oct 17
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Askov, MN
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 23 – Mar 9 | Apr 20 – May 4 | — | — |
| Peppers | Mar 9 – Mar 23 | Jun 1 – Jun 15 | — | — |
| Eggplant | Mar 9 – Mar 23 | Jun 1 – Jun 15 | — | — |
| Tomatoes | Mar 23 – Apr 6 | May 25 – Jun 8 | — | — |
| Lettuce | Mar 23 – Apr 6 | Apr 27 – May 11 | Apr 20 – May 25 | Aug 1 – Aug 29 |
| Kale | Mar 23 – Apr 6 | Apr 20 – May 4 | Apr 20 – May 4 | Jul 18 – Aug 8 |
| Broccoli | Mar 23 – Apr 6 | May 4 – May 18 | — | Jun 20 – Jul 11 |
| Cabbage | Mar 23 – Apr 6 | Apr 27 – May 11 | — | Jun 20 – Jul 11 |
| Cauliflower | Mar 23 – Apr 6 | May 4 – May 18 | — | Jun 20 – Jul 11 |
| Okra | Apr 6 – Apr 20 | Jun 8 – Jun 22 | Jun 8 – Jun 22 | — |
| Basil | Apr 6 – Apr 20 | May 25 – Jun 8 | — | — |
| Peas | — | — | Apr 6 – Apr 27 | Jul 4 – Jul 25 |
| Spinach | — | — | Apr 6 – Apr 27 | Aug 1 – Aug 22 |
| Radishes | — | — | Apr 13 – May 25 | Aug 15 – Sep 5 |
| Cucumbers | Apr 20 – Apr 27 | Jun 1 – Jun 8 | May 25 – Jun 8 | Jul 11 – Jul 25 |
| Zucchini & Summer Squash | Apr 20 – Apr 27 | — | May 25 – Jun 8 | Jul 18 – Aug 1 |
| Winter Squash & Pumpkins | Apr 20 – Apr 27 | — | May 25 – Jun 8 | — |
| Melons & Watermelon | Apr 20 – Apr 27 | Jun 1 – Jun 15 | — | — |
| Carrots | — | — | Apr 27 – May 25 | Jul 4 – Jul 18 |
| Beets | — | — | Apr 27 – May 25 | Jul 18 – Aug 1 |
| Potatoes | — | — | Apr 27 – May 18 | — |
| Swiss Chard | — | — | May 4 – Jun 1 | Jul 18 – Aug 1 |
| Cilantro | — | — | May 4 – May 25 | Aug 1 – Aug 22 |
| Green Beans | — | — | May 25 – Jun 15 | Jul 11 – Jul 25 |
| Sweet Corn | — | — | May 25 – Jun 8 | — |
| Sweet Potatoes | — | Jun 1 – Jun 22 | — | — |
| Garlic | — | — | — | Sep 12 – Oct 17 |
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 Bruno 7ene, MN weather station, 20 km away (elevation 1,253 ft (382 m)).
Frost dates near Askov
- Willow River May 12 · Oct 2
- Bruno May 18 · Sep 26
- Finlayson May 13 · Sep 29
- Sandstone May 18 · Sep 26
- Sturgeon Lake May 12 · Oct 2
- Hinckley May 16 · Sep 24
- Kerrick May 18 · Sep 26
- Moose Lake May 12 · Oct 2
- Kettle River May 12 · Oct 2
- Brook Park May 16 · Sep 24
Frequently asked questions
When is the last frost in Askov, MN?
The median last spring frost in Askov, MN is May 18. There is still about a 10% chance of frost after June 1, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Askov, MN?
The median first fall frost is September 26, with about a 10% chance of frost before September 12.
How long is the growing season in Askov, MN?
About 131 days between the median last spring frost and first fall frost.
What planting zone is Askov, MN?
Askov, MN is in USDA hardiness zone 4a.