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Basil Growing Season for Michigan

The NOAA National Climatic Data Center provides information to the public about spring and fall frost dates in the United States and the length of the expected growing season for each area. These statistics are calculated using data collected from 1971 to 2000, across 4300 weather stations located in every part of the country.

While informative, the statistics that NOAA provides is overwhelming. So, we took the liberty of extracting the most basic information that we feel would be useful to someone interested in growing basil outdoors.

The table below lists the date after which it should be safe to plant basil outdoors in each area of the state. This information is based on NOAA’s calculations for a 10% probability of temperatures falling below 36 degrees Fahrenheit. This means that, on average, there is only a 10% chance that you will see frost after this date. Also listed is the estimated length of the growing season. This is how many days you can expect to have before the risk of frost is greater than 10%.

Please use this information at your own risk. You must take into consideration many varying factors, for example, micro-climates or the presence of valleys and bodies of water, to determine your actual growing season.

StateCountyLast Frost DateLength of Growing Season
MIAlcona6/15100
MIAlger7/0551
MIAllegan6/13100
MIAlpena6/03108
MIArenac6/1389
MIBaraga7/2814
MIBarry6/13101
MIBenzie6/09112
MIBerrien5/27133
MIBranch5/30112
MICalhoun6/11100
MICass6/08102
MICharlevoix7/1541
MICheboygan6/1296
MIChippewa6/07105
MIClinton6/1296
MICrawford7/1636
MIDelta6/06109
MIDickinson6/2473
MIEaton6/1394
MIEmmet6/09106
MIGenesee6/07109
MIGladwin6/2873
MIGogebic6/3059
MIGratiot6/04109
MIHillsdale6/1891
MIHoughton7/2617
MIHuron6/06114
MIIngham6/09103
MIIonia6/1299
MIIosco6/2084
MIIron7/2520
MIIsabella6/03113
MIJackson6/11108
MIKalamazoo6/01118
MIKalkaska7/0842
MIKent6/02113
MILake7/0350
MILapeer6/1683
MILeelanau6/2571
MILenawee6/03111
MILivingston6/02113
MILuce7/1050
MIMacomb5/25131
MIManistee6/2080
MIMarquette7/0158
MIMason6/1492
MIMecosta6/1486
MIMenominee7/0352
MIMidland6/05107
MIMissaukee7/2521
MIMonroe5/21132
MIMontcalm6/1495
MIMontmorency7/0154
MIMuskegon6/06104
MINewaygo7/0262
MIOceana7/0262
MIOgemaw6/1681
MIOntonagon7/0745
MIOscoda6/1976
MIOtsego7/0455
MIOttawa6/11105
MIPresque Isle6/1487
MIRoscommon7/2521
MISaginaw5/27119
MISanilac6/04112
MISchoolcraft6/1780
MIShiawassee6/09104
MISt. Clair5/26123
MISt. Joseph6/05112
MITuscola6/2083
MIVan Buren6/1694
MIWashtenaw5/18135
MIWayne5/28125
MIWexford7/1834