Falmouth, MI frost dates
Last spring frostMay 30median date
First fall frostSep 15median date
Growing season108 daysfrost-free
Hardiness zone5aZone 5a
How Falmouth compares
- In 8 years out of 10, the last spring frost in Falmouth falls between May 12 and June 19, a 38-day window. The first fall frost falls between August 26 and October 1.
- The median last frost is 25 days later than the Michigan median of May 5.
- Its 108-day growing season is among the shortest of the 878 Michigan places with a regular frost season.
- The last frost is 27 days later than the zone 5a median of May 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5a chart.
- The weather station records an average of 191 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 12 |
| 50% (median) | May 30 |
| 10% (safe for tender plants) | June 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 26 |
| 50% (median) | September 15 |
| 90% (late) | October 1 |
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 Falmouth, MI
Falmouth, MI frost dates — last frost May 30, first frost Sep 15, zone 5a. whenisthelastfrost.com
Crop
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Start indoors: Mar 7 to Mar 21Transplant outside: May 2 to May 16
Start indoors: Mar 21 to Apr 4Transplant outside: Jun 13 to Jun 27
Start indoors: Mar 21 to Apr 4Transplant outside: Jun 13 to Jun 27
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 6 to Jun 20
Start indoors: Apr 4 to Apr 18Transplant outside: May 9 to May 23Sow outdoors: May 2 to Jun 6Plant for fall: Jul 21 to Aug 18
Start indoors: Apr 4 to Apr 18Transplant outside: May 2 to May 16Sow outdoors: May 2 to May 16Plant for fall: Jul 7 to Jul 28
Start indoors: Apr 4 to Apr 18Transplant outside: May 16 to May 30
Start indoors: Apr 4 to Apr 18Transplant outside: May 9 to May 23
Start indoors: Apr 4 to Apr 18Transplant outside: May 16 to May 30
Start indoors: Apr 18 to May 2Transplant outside: Jun 20 to Jul 4Sow outdoors: Jun 20 to Jul 4
Start indoors: Apr 18 to May 2Transplant outside: Jun 6 to Jun 20
Sow outdoors: Apr 18 to May 9Plant for fall: Jun 23 to Jul 14
Sow outdoors: Apr 18 to May 9Plant for fall: Jul 21 to Aug 11
Sow outdoors: Apr 25 to Jun 6Plant for fall: Aug 4 to Aug 25
Start indoors: May 2 to May 9Transplant outside: Jun 13 to Jun 20Sow outdoors: Jun 6 to Jun 20
Start indoors: May 2 to May 9Sow outdoors: Jun 6 to Jun 20Plant for fall: Jul 7 to Jul 21
Start indoors: May 2 to May 9Sow outdoors: Jun 6 to Jun 20
Start indoors: May 2 to May 9Transplant outside: Jun 13 to Jun 27
Sow outdoors: May 9 to Jun 6Plant for fall: Jun 23 to Jul 7
Sow outdoors: May 9 to Jun 6Plant for fall: Jul 7 to Jul 21
Sow outdoors: May 9 to May 30
Sow outdoors: May 16 to Jun 13Plant for fall: Jul 7 to Jul 21
Sow outdoors: May 16 to Jun 6Plant for fall: Jul 21 to Aug 11
Sow outdoors: Jun 6 to Jun 27
Sow outdoors: Jun 6 to Jun 20
Transplant outside: Jun 13 to Jul 4
Plant for fall: Sep 1 to Oct 6
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Falmouth, MI
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 7 – Mar 21 | May 2 – May 16 | — | — |
| Peppers | Mar 21 – Apr 4 | Jun 13 – Jun 27 | — | — |
| Eggplant | Mar 21 – Apr 4 | Jun 13 – Jun 27 | — | — |
| Tomatoes | Apr 4 – Apr 18 | Jun 6 – Jun 20 | — | — |
| Lettuce | Apr 4 – Apr 18 | May 9 – May 23 | May 2 – Jun 6 | Jul 21 – Aug 18 |
| Kale | Apr 4 – Apr 18 | May 2 – May 16 | May 2 – May 16 | Jul 7 – Jul 28 |
| Broccoli | Apr 4 – Apr 18 | May 16 – May 30 | — | — |
| Cabbage | Apr 4 – Apr 18 | May 9 – May 23 | — | — |
| Cauliflower | Apr 4 – Apr 18 | May 16 – May 30 | — | — |
| Okra | Apr 18 – May 2 | Jun 20 – Jul 4 | Jun 20 – Jul 4 | — |
| Basil | Apr 18 – May 2 | Jun 6 – Jun 20 | — | — |
| Peas | — | — | Apr 18 – May 9 | Jun 23 – Jul 14 |
| Spinach | — | — | Apr 18 – May 9 | Jul 21 – Aug 11 |
| Radishes | — | — | Apr 25 – Jun 6 | Aug 4 – Aug 25 |
| Cucumbers | May 2 – May 9 | Jun 13 – Jun 20 | Jun 6 – Jun 20 | — |
| Zucchini & Summer Squash | May 2 – May 9 | — | Jun 6 – Jun 20 | Jul 7 – Jul 21 |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 108 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 2 – May 9 | — | Jun 6 – Jun 20 | — |
| Melons & Watermelon | May 2 – May 9 | Jun 13 – Jun 27 | — | — |
| Carrots | — | — | May 9 – Jun 6 | Jun 23 – Jul 7 |
| Beets | — | — | May 9 – Jun 6 | Jul 7 – Jul 21 |
| Potatoes | — | — | May 9 – May 30 | — |
| Swiss Chard | — | — | May 16 – Jun 13 | Jul 7 – Jul 21 |
| Cilantro | — | — | May 16 – Jun 6 | Jul 21 – Aug 11 |
| Green Beans | — | — | Jun 6 – Jun 27 | — |
| Sweet Corn | — | — | Jun 6 – Jun 20 | — |
| Sweet Potatoes Warning: Your frost-free season is about 108 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 13 – Jul 4 | — | — |
| Garlic | — | — | — | Sep 1 – Oct 6 |
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 Houghton Lake 6 Wsw, MI weather station, 12 km away (elevation 1,135 ft (346 m)).
Frost dates near Falmouth
- Merritt May 30 · Sep 15
- Lake City May 22 · Sep 26
- Mc Bain May 22 · Sep 26
- Houghton Lake Heights May 20 · Oct 1
- Houghton Lake May 20 · Oct 1
- Marion May 15 · Oct 1
- Prudenville May 19 · Sep 23
- Higgins Lake May 19 · Sep 23
- Harrison May 9 · Oct 4
- Lake George May 9 · Oct 4
Frequently asked questions
When is the last frost in Falmouth, MI?
The median last spring frost in Falmouth, MI is May 30. There is still about a 10% chance of frost after June 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Falmouth, MI?
The median first fall frost is September 15, with about a 10% chance of frost before August 26.
How long is the growing season in Falmouth, MI?
About 108 days between the median last spring frost and first fall frost.
What planting zone is Falmouth, MI?
Falmouth, MI is in USDA hardiness zone 5a.