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Basil Growing Season for Indiana

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
INAdams5/17135
INAllen5/15138
INBartholomew5/11144
INBlackford5/19132
INBoone5/26126
INCarroll5/25123
INClark5/18137
INClinton5/26127
INCrawford6/02113
INDaviess5/12140
INDecatur5/15137
INDelaware5/22126
INDubois5/16137
INElkhart5/24125
INFranklin5/23128
INFulton5/25125
INGibson5/12149
INGrant5/19132
INHancock5/15140
INHenry5/18134
INHoward5/25122
INJackson5/14138
INJasper5/21133
INJay5/22128
INJefferson5/14147
INJennings5/19134
INKosciusko5/30121
INLagrange6/01116
INLake5/31118
INLaporte6/03108
INLawrence5/19134
INMadison5/16138
INMarion5/12142
INMartin5/18135
INMonroe5/10149
INMorgan5/28121
INNewton5/22126
INOrange5/23126
INOwen5/27125
INParke5/20137
INPerry5/04160
INPorter6/03108
INPosey4/28164
INPulaski5/31125
INPutnam5/14142
INRandolph5/15134
INRush5/17136
INScott5/15140
INShelby5/15141
INSpencer5/15141
INSt. Joseph5/27129
INSteuben6/07105
INSwitzerland5/16142
INTippecanoe5/27121
INVanderburgh5/04156
INVigo5/23131
INWabash5/28120
INWashington5/15140
INWayne6/01115
INWells5/21127
INWhitley5/27121