Dorr, MI frost dates
Last spring frostMay 4median date
First fall frostOct 15median date
Growing season164 daysfrost-free
Hardiness zone6aZone 6a
How Dorr compares
- In 8 years out of 10, the last spring frost in Dorr falls between April 22 and May 22, a 30-day window. The first fall frost falls between September 30 and October 29.
- The median last frost is 1 day earlier than the Michigan median of May 5.
- Its 164-day growing season is longer than 57% of the 878 Michigan places with a regular frost season (state median 162 days).
- The last frost is 5 days later than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 148 nights a year at or below 32°F.
- Compared with Wyoming, MI, 21 km away, the last frost here is 2 days earlier than there and the growing season is 7 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 22 |
| 50% (median) | May 4 |
| 10% (safe for tender plants) | May 22 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 30 |
| 50% (median) | October 15 |
| 90% (late) | October 29 |
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 Dorr, MI
Dorr, MI frost dates — last frost May 4, first frost Oct 15, zone 6a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 9 to Feb 23Transplant outside: Apr 6 to Apr 20
Start indoors: Feb 23 to Mar 9Transplant outside: May 18 to Jun 1
Start indoors: Feb 23 to Mar 9Transplant outside: May 18 to Jun 1
Start indoors: Mar 9 to Mar 23Transplant outside: May 11 to May 25
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 13 to Apr 27Sow outdoors: Apr 6 to May 11Plant for fall: Aug 20 to Sep 17
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 6 to Apr 20Sow outdoors: Apr 6 to Apr 20Plant for fall: Aug 6 to Aug 27
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 20 to May 4Plant for fall: Jul 9 to Jul 30
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 13 to Apr 27Plant for fall: Jul 9 to Jul 30
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 20 to May 4Plant for fall: Jul 9 to Jul 30
Start indoors: Mar 23 to Apr 6Transplant outside: May 25 to Jun 8Sow outdoors: May 25 to Jun 8
Start indoors: Mar 23 to Apr 6Transplant outside: May 11 to May 25
Sow outdoors: Mar 23 to Apr 13Plant for fall: Jul 23 to Aug 13
Sow outdoors: Mar 23 to Apr 13Plant for fall: Aug 20 to Sep 10
Sow outdoors: Mar 30 to May 11Plant for fall: Sep 3 to Sep 24
Start indoors: Apr 6 to Apr 13Transplant outside: May 18 to May 25Sow outdoors: May 11 to May 25Plant for fall: Jul 30 to Aug 13
Start indoors: Apr 6 to Apr 13Sow outdoors: May 11 to May 25Plant for fall: Aug 6 to Aug 20
Start indoors: Apr 6 to Apr 13Sow outdoors: May 11 to May 25
Start indoors: Apr 6 to Apr 13Transplant outside: May 18 to Jun 1
Sow outdoors: Apr 13 to May 11Plant for fall: Jul 23 to Aug 6
Sow outdoors: Apr 13 to May 11Plant for fall: Aug 6 to Aug 20
Sow outdoors: Apr 13 to May 4
Sow outdoors: Apr 20 to May 18Plant for fall: Aug 6 to Aug 20
Sow outdoors: Apr 20 to May 11Plant for fall: Aug 20 to Sep 10
Sow outdoors: May 11 to Jun 1Plant for fall: Jul 30 to Aug 13
Sow outdoors: May 11 to May 25
Transplant outside: May 18 to Jun 8
Plant for fall: Oct 1 to Nov 5
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Dorr, MI
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 9 – Feb 23 | Apr 6 – Apr 20 | — | — |
| Peppers | Feb 23 – Mar 9 | May 18 – Jun 1 | — | — |
| Eggplant | Feb 23 – Mar 9 | May 18 – Jun 1 | — | — |
| Tomatoes | Mar 9 – Mar 23 | May 11 – May 25 | — | — |
| Lettuce | Mar 9 – Mar 23 | Apr 13 – Apr 27 | Apr 6 – May 11 | Aug 20 – Sep 17 |
| Kale | Mar 9 – Mar 23 | Apr 6 – Apr 20 | Apr 6 – Apr 20 | Aug 6 – Aug 27 |
| Broccoli | Mar 9 – Mar 23 | Apr 20 – May 4 | — | Jul 9 – Jul 30 |
| Cabbage | Mar 9 – Mar 23 | Apr 13 – Apr 27 | — | Jul 9 – Jul 30 |
| Cauliflower | Mar 9 – Mar 23 | Apr 20 – May 4 | — | Jul 9 – Jul 30 |
| Okra | Mar 23 – Apr 6 | May 25 – Jun 8 | May 25 – Jun 8 | — |
| Basil | Mar 23 – Apr 6 | May 11 – May 25 | — | — |
| Peas | — | — | Mar 23 – Apr 13 | Jul 23 – Aug 13 |
| Spinach | — | — | Mar 23 – Apr 13 | Aug 20 – Sep 10 |
| Radishes | — | — | Mar 30 – May 11 | Sep 3 – Sep 24 |
| Cucumbers | Apr 6 – Apr 13 | May 18 – May 25 | May 11 – May 25 | Jul 30 – Aug 13 |
| Zucchini & Summer Squash | Apr 6 – Apr 13 | — | May 11 – May 25 | Aug 6 – Aug 20 |
| Winter Squash & Pumpkins | Apr 6 – Apr 13 | — | May 11 – May 25 | — |
| Melons & Watermelon | Apr 6 – Apr 13 | May 18 – Jun 1 | — | — |
| Carrots | — | — | Apr 13 – May 11 | Jul 23 – Aug 6 |
| Beets | — | — | Apr 13 – May 11 | Aug 6 – Aug 20 |
| Potatoes | — | — | Apr 13 – May 4 | — |
| Swiss Chard | — | — | Apr 20 – May 18 | Aug 6 – Aug 20 |
| Cilantro | — | — | Apr 20 – May 11 | Aug 20 – Sep 10 |
| Green Beans | — | — | May 11 – Jun 1 | Jul 30 – Aug 13 |
| Sweet Corn | — | — | May 11 – May 25 | — |
| Sweet Potatoes | — | May 18 – Jun 8 | — | — |
| Garlic | — | — | — | Oct 1 – Nov 5 |
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 Allegan 5ne, MI weather station, 16 km away (elevation 751 ft (229 m)).
Frost dates near Dorr
- Burnips May 4 · Oct 15
- Moline Apr 30 · Oct 14
- Hopkins May 4 · Oct 15
- Byron Center Apr 30 · Oct 14
- Jamestown May 6 · Oct 10
- Wayland May 4 · Oct 15
- Bradley May 4 · Oct 15
- Hamilton Apr 28 · Oct 21
- Shelbyville May 4 · Oct 15
- Hudsonville May 6 · Oct 10
Frequently asked questions
When is the last frost in Dorr, MI?
The median last spring frost in Dorr, MI is May 4. There is still about a 10% chance of frost after May 22, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Dorr, MI?
The median first fall frost is October 15, with about a 10% chance of frost before September 30.
How long is the growing season in Dorr, MI?
About 164 days between the median last spring frost and first fall frost.
What planting zone is Dorr, MI?
Dorr, MI is in USDA hardiness zone 6a.