Two of the most important dates for any gardener to know (especially vegetable gardeners) are the frost dates for your area. The spring frost date is the estimated day of the last hard frost of winter. The fall frost date is the estimated day of the first hard, killing frost of late autumn.

The spring frost date is largely considered the first day of the outdoor gardening season. After this day it is unlikely that you will get a hard frost that would kill tender plants.

The fall frost date is basically the end of the outdoor gardening season for tender plants including most garden vegetables (unless you use season extenders such as row covers, cold frames, etc.).

The following is a list of the spring and fall frost dates for many Michigan communities. These dates come from data at the National Climatic Data Center web site and should be considered more of a guideline rather that information that is set in stone. Some years will be a little warmer and some a little cooler. In a cool and rainy spring you might want to wait a week or two longer to plant out your tomatoes. If you’re having a particularly warm fall you can probably count on an additional 2 or 3 weeks of harvesting cucumbers and zucchini. Pay attention to your environment (and your local weather reports) and act accordingly.

Community Spring Fall
Adrian May 17 September 24
Allegan May 26 September 23
Alma May 19 September 24
Alpena May 19 September 28
Ann Arbor May 10 October 5
Atlanta June 10 September 8
Bad Axe May 22 September 27
Baldwin June 11 September 5
Battle Creek May 24 September 22
Benton Harbor May 21 September 30
Bergland June 16 August 31
Big Rapids June 1 September 12
Bloomingdale May 29 September 19
Boyne June 19 September 3
Cadillac June 21 September 2
Caro June 1 September 15
Champion July 9 August 17
Charlotte May 24 September 20
Cheboygan May 29 September 24
Coldwater May 15 September 26
Cross Village June 6 September 26
Dearborn May 13 September 29
Detour Village May 24 September 28
Detroit May 10 October 4
Dowagiac May 22 September 24
East Jordan June 10 September 8
East Lansing May 21 September 23
East Tawas June 3 September 18
Eau Claire May 10 October 11
Escanaba May 21 September 26
Flint May 21 September 28
Frankfort May 23 October 4
Gaylord June 11 September 8
Gladwin June 4 September 15
Grand Haven May 6 October 10
Grand Marais July 1 September 3
Grand Rapids May 16 September 28
Grayling June 21 August 31
Greenville May 26 September 18
Grosse Pointe Farms May 7 October 11
Gull Lake May 14 September 29
Hale May 30 September 19
Harbor Beach May 16 September 30
Harrisville May 27 September 26
Hart May 27 September 25
Hastings May 25 September 23
Herman June 30 August 26
Hesperia June 9 September 9
Hillsdale May 27 September 21
Holland May 21 September 29
Houghton Lake June 27 August 25
Ionia May 22 September 21
Iron Mountain June 7 September 11
Ironwood June 12 September 8
Jackson May 20 September 25
Kalkaska June 14 September 1
Kenton July 1 August 19
Lake City June 21 September 7
Lansing May 28 September 19
Lapeer May 26 September 18
Ludington May 31 September 21
Lupton June 25 August 31
Manistee May 29 September 23
Manistique May 30 September 18
Maple City June 9 September 19
Marquette May 26 October 1
Midland May 19 September 23
Milford May 16 September 28
Mio June 7 September 11
Monroe May 6 October 6
Montague June 6 September 13
Mount Clemens May 10 October 6
Mt Pleasant May 18 September 24
Munising June 13 September 15
Muskegon May 18 September 24
Newberry June 16 September 7
Onaway May 30 September 17
Owosso May 21 September 25
Pellston June 14 September 1
Petoskey May 26 September 29
Port Huron May 11 October 3
Saginaw May 12 September 28
St James June 2 September 29
St Johns May 18 September 27
Sandusky May 19 September 26
Sault Ste Marie June 12 September 11
Seney June 9 September 8
South Haven May 8 October 9
Stambaugh July 1 August 21
Standish June 1 September 15
Stephenson June 13 September 6
Tahquamenon Falls July 9 August 23
Three Rivers May 17 September 27
Vanderbilt July 7 August 19
West Branch June 2 September 13
Whitefish Point June 15 September 17
Ypsilanti May 5 October 5