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Basil Growing Season for Minnesota

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
MNAitkin6/2575
MNAnoka6/1294
MNBecker6/2655
MNBeltrami6/1381
MNBig Stone5/22118
MNBrown5/28112
MNCarlton6/2558
MNCarver5/23120
MNCass5/30111
MNChippewa6/0398
MNChisago5/24120
MNClay5/3199
MNClearwater6/1771
MNCook6/1196
MNCottonwood5/27110
MNCrow Wing6/1881
MNDakota5/23122
MNDouglas5/21121
MNFaribault5/22118
MNFillmore6/1680
MNFreeborn5/22120
MNGoodhue5/29113
MNHennepin5/24120
MNHouston5/24118
MNIsanti6/1096
MNItasca6/1674
MNKanabec6/3061
MNKandiyohi5/24115
MNKoochiching6/3056
MNLac Qui Parle6/0593
MNLake6/16100
MNLake Of The Woods6/1677
MNLyon5/24117
MNMarshall6/0194
MNMartin5/17130
MNMcleod5/23117
MNMeeker5/31109
MNMille Lacs6/0899
MNMorrison6/0597
MNMower5/29108
MNNicollet5/26115
MNNobles5/27110
MNNorman5/29104
MNOlmsted6/02109
MNOtter Tail5/31111
MNPine6/1579
MNPipestone6/2372
MNPolk6/2565
MNPope6/0499
MNRamsey5/25123
MNRed Lake6/0791
MNRedwood5/28108
MNRenville5/23117
MNRice6/08101
MNRock5/29105
MNRoseau7/0842
MNScott6/0694
MNSherburne6/1682
MNSibley5/22120
MNSt. Louis7/0782
MNStearns5/22122
MNSteele5/31110
MNStevens5/28105
MNSwift5/24116
MNTodd6/0593
MNTraverse5/22117
MNWabasha6/1394
MNWadena6/0497
MNWaseca5/25114
MNWashington5/27116
MNWatonwan5/26116
MNWilkin5/29106
MNWinona5/25117
MNWright5/24119
MNYellow Medicine5/26112