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Basil Growing Season for Tennessee

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
TNAnderson5/18144
TNBedford5/08151
TNBledsoe5/15144
TNBlount5/02162
TNBradley5/14147
TNCannon5/22133
TNCarroll5/04158
TNCheatham5/17140
TNClaiborne5/28123
TNClay5/15146
TNCocke5/14145
TNCoffee5/03158
TNCumberland5/19138
TNDavidson4/28168
TNDekalb5/19137
TNDickson5/11149
TNDyer4/21173
TNFayette4/26164
TNFentress5/20137
TNGibson5/04154
TNGiles5/02160
TNGreene5/20133
TNGrundy5/07156
TNHamilton4/28171
TNHardeman4/27167
TNHardin5/02165
TNHawkins5/17140
TNHaywood4/21177
TNHenderson5/02160
TNHenry5/01162
TNHickman5/23127
TNHumphreys5/16142
TNJohnson6/09103
TNKnox5/11150
TNLauderdale4/20181
TNLawrence5/16143
TNLincoln5/19137
TNLoudon5/03165
TNMacon5/05157
TNMadison5/01163
TNMarion5/07156
TNMarshall5/15137
TNMaury5/13145
TNMcminn5/16146
TNMcnairy5/11151
TNMontgomery5/09150
TNObion5/01161
TNOverton5/19136
TNPerry5/12148
TNPolk5/22135
TNPutnam5/19141
TNRhea5/12151
TNRoane5/16142
TNRobertson5/12144
TNRutherford5/06156
TNScott5/25124
TNSevier5/24135
TNShelby4/14195
TNSmith5/09155
TNStewart5/09151
TNSullivan5/15142
TNSumner5/04153
TNTipton4/24175
TNWarren5/09151
TNWayne5/24130
TNWeakley5/05155
TNWhite5/19140
TNWilliamson5/15142
TNWilson5/20135