Garrison, MN frost dates
Last spring frostMay 10median date
First fall frostOct 3median date
Growing season146 daysfrost-free
Hardiness zone4aZone 4a
How Garrison compares
- In 8 years out of 10, the last spring frost in Garrison falls between April 27 and May 28, a 31-day window. The first fall frost falls between September 19 and October 17.
- The median last frost is 5 days later than the Minnesota median of May 5.
- Its 146-day growing season is longer than 35% of the 801 Minnesota places with a regular frost season (state median 151 days).
- The last frost is typical for zone 4a, where the median is May 12.
- The weather station records an average of 176 nights a year at or below 32°F.
- Compared with Saint Cloud, MN, 79 km away, the last frost here is 3 days later than there and the growing season is the same length.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 27 |
| 50% (median) | May 10 |
| 10% (safe for tender plants) | May 28 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 19 |
| 50% (median) | October 3 |
| 90% (late) | October 17 |
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 Garrison, MN
Garrison, MN frost dates — last frost May 10, first frost Oct 3, zone 4a. whenisthelastfrost.com
Crop
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Start indoors: Feb 15 to Mar 1Transplant outside: Apr 12 to Apr 26
Start indoors: Mar 1 to Mar 15Transplant outside: May 24 to Jun 7
Start indoors: Mar 1 to Mar 15Transplant outside: May 24 to Jun 7
Start indoors: Mar 15 to Mar 29Transplant outside: May 17 to May 31
Start indoors: Mar 15 to Mar 29Transplant outside: Apr 19 to May 3Sow outdoors: Apr 12 to May 17Plant for fall: Aug 8 to Sep 5
Start indoors: Mar 15 to Mar 29Transplant outside: Apr 12 to Apr 26Sow outdoors: Apr 12 to Apr 26Plant for fall: Jul 25 to Aug 15
Start indoors: Mar 15 to Mar 29Transplant outside: Apr 26 to May 10Plant for fall: Jun 27 to Jul 18
Start indoors: Mar 15 to Mar 29Transplant outside: Apr 19 to May 3Plant for fall: Jun 27 to Jul 18
Start indoors: Mar 15 to Mar 29Transplant outside: Apr 26 to May 10Plant for fall: Jun 27 to Jul 18
Start indoors: Mar 29 to Apr 12Transplant outside: May 31 to Jun 14Sow outdoors: May 31 to Jun 14
Start indoors: Mar 29 to Apr 12Transplant outside: May 17 to May 31
Sow outdoors: Mar 29 to Apr 19Plant for fall: Jul 11 to Aug 1
Sow outdoors: Mar 29 to Apr 19Plant for fall: Aug 8 to Aug 29
Sow outdoors: Apr 5 to May 17Plant for fall: Aug 22 to Sep 12
Start indoors: Apr 12 to Apr 19Transplant outside: May 24 to May 31Sow outdoors: May 17 to May 31Plant for fall: Jul 18 to Aug 1
Start indoors: Apr 12 to Apr 19Sow outdoors: May 17 to May 31Plant for fall: Jul 25 to Aug 8
Start indoors: Apr 12 to Apr 19Sow outdoors: May 17 to May 31
Start indoors: Apr 12 to Apr 19Transplant outside: May 24 to Jun 7
Sow outdoors: Apr 19 to May 17Plant for fall: Jul 11 to Jul 25
Sow outdoors: Apr 19 to May 17Plant for fall: Jul 25 to Aug 8
Sow outdoors: Apr 19 to May 10
Sow outdoors: Apr 26 to May 24Plant for fall: Jul 25 to Aug 8
Sow outdoors: Apr 26 to May 17Plant for fall: Aug 8 to Aug 29
Sow outdoors: May 17 to Jun 7Plant for fall: Jul 18 to Aug 1
Sow outdoors: May 17 to May 31
Transplant outside: May 24 to Jun 14
Plant for fall: Sep 19 to Oct 24
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Garrison, MN
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 15 – Mar 1 | Apr 12 – Apr 26 | — | — |
| Peppers | Mar 1 – Mar 15 | May 24 – Jun 7 | — | — |
| Eggplant | Mar 1 – Mar 15 | May 24 – Jun 7 | — | — |
| Tomatoes | Mar 15 – Mar 29 | May 17 – May 31 | — | — |
| Lettuce | Mar 15 – Mar 29 | Apr 19 – May 3 | Apr 12 – May 17 | Aug 8 – Sep 5 |
| Kale | Mar 15 – Mar 29 | Apr 12 – Apr 26 | Apr 12 – Apr 26 | Jul 25 – Aug 15 |
| Broccoli | Mar 15 – Mar 29 | Apr 26 – May 10 | — | Jun 27 – Jul 18 |
| Cabbage | Mar 15 – Mar 29 | Apr 19 – May 3 | — | Jun 27 – Jul 18 |
| Cauliflower | Mar 15 – Mar 29 | Apr 26 – May 10 | — | Jun 27 – Jul 18 |
| Okra | Mar 29 – Apr 12 | May 31 – Jun 14 | May 31 – Jun 14 | — |
| Basil | Mar 29 – Apr 12 | May 17 – May 31 | — | — |
| Peas | — | — | Mar 29 – Apr 19 | Jul 11 – Aug 1 |
| Spinach | — | — | Mar 29 – Apr 19 | Aug 8 – Aug 29 |
| Radishes | — | — | Apr 5 – May 17 | Aug 22 – Sep 12 |
| Cucumbers | Apr 12 – Apr 19 | May 24 – May 31 | May 17 – May 31 | Jul 18 – Aug 1 |
| Zucchini & Summer Squash | Apr 12 – Apr 19 | — | May 17 – May 31 | Jul 25 – Aug 8 |
| Winter Squash & Pumpkins | Apr 12 – Apr 19 | — | May 17 – May 31 | — |
| Melons & Watermelon | Apr 12 – Apr 19 | May 24 – Jun 7 | — | — |
| Carrots | — | — | Apr 19 – May 17 | Jul 11 – Jul 25 |
| Beets | — | — | Apr 19 – May 17 | Jul 25 – Aug 8 |
| Potatoes | — | — | Apr 19 – May 10 | — |
| Swiss Chard | — | — | Apr 26 – May 24 | Jul 25 – Aug 8 |
| Cilantro | — | — | Apr 26 – May 17 | Aug 8 – Aug 29 |
| Green Beans | — | — | May 17 – Jun 7 | Jul 18 – Aug 1 |
| Sweet Corn | — | — | May 17 – May 31 | — |
| Sweet Potatoes | — | May 24 – Jun 14 | — | — |
| Garlic | — | — | — | Sep 19 – Oct 24 |
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 Isle 12n, MN weather station, 27 km away (elevation 1,286 ft (392 m)).
Frost dates near Garrison
- Hillman May 4 · Oct 5
- Onamia May 10 · Oct 3
- Deerwood May 16 · Sep 28
- Brainerd May 13 · Sep 27
- Lastrup May 4 · Oct 5
- Isle May 10 · Oct 3
- Wahkon May 10 · Oct 3
- Ironton May 13 · Sep 27
- Aitkin May 16 · Sep 28
- Pierz May 4 · Oct 5
Frequently asked questions
When is the last frost in Garrison, MN?
The median last spring frost in Garrison, MN is May 10. There is still about a 10% chance of frost after May 28, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Garrison, MN?
The median first fall frost is October 3, with about a 10% chance of frost before September 19.
How long is the growing season in Garrison, MN?
About 146 days between the median last spring frost and first fall frost.
What planting zone is Garrison, MN?
Garrison, MN is in USDA hardiness zone 4a.