Oklahoma

OK Statute Title 68-1352:

"As used in the Oklahoma Sales Tax Code, the terms "farm", "farming", "farming operation", "agricultural production" and "production of agricultural products" shall be deemed to include the planting, growing, cultivation and harvesting of shrubs, flowers, trees and other plants for sale in the wholesale division of a nursery operation and the planting, growing, cultivation and harvesting of sod by commercial growers of sod."

The deadline to file for an agricultural classification is March 15th.