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Basil Growing Season for Oklahoma

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
OKAdair5/08149
OKAlfalfa5/02160
OKBeaver5/14138
OKBeckham5/06150
OKBlaine4/28163
OKBryan4/23177
OKCaddo5/03154
OKCanadian4/27162
OKCarter4/17195
OKCherokee5/07149
OKChoctaw4/16190
OKCimarron5/19130
OKCleveland4/29167
OKComanche4/28166
OKCotton4/26170
OKCraig5/05150
OKCreek5/02157
OKCuster4/26167
OKDelaware4/30158
OKDewey5/09146
OKEllis5/06151
OKGarfield4/26172
OKGarvin4/29169
OKGrady4/27165
OKGrant5/07152
OKGreer4/28165
OKHarmon4/25167
OKHarper5/13142
OKHaskell4/26163
OKHughes4/24168
OKJackson4/25169
OKJefferson4/21178
OKKay5/05158
OKKingfisher5/04161
OKKiowa4/23170
OKLatimer5/01153
OKLincoln4/30157
OKLogan5/03156
OKLove4/17187
OKMarshall4/18189
OKMayes5/06146
OKMcclain5/02163
OKMccurtain4/21174
OKMcintosh4/24168
OKMuskogee4/26167
OKNoble4/29163
OKNowata4/28160
OKOkfuskee4/16186
OKOklahoma4/21179
OKOkmulgee4/28154
OKOsage5/05153
OKOttawa5/04148
OKPawnee5/06152
OKPayne4/18180
OKPittsburg4/26171
OKPontotoc4/17181
OKPushmataha4/24170
OKRoger Mills5/09149
OKRogers5/01158
OKSeminole4/23176
OKSequoyah4/29161
OKStephens4/16190
OKTexas5/15137
OKTillman4/23182
OKTulsa4/29160
OKWagoner4/27168
OKWashita4/26166
OKWoods5/07145
OKWoodward5/07150