Wash. Admin. Code § 16-302-800
Land to produce any class of sunflower seed must not have grown sunflowers the previous three years or the land must have grown two intervening irrigated crops.
[Statutory Authority: RCW 15.49.005, 15.49.081, 15.49.310, 15.49.370(3), and chapter 34.05 RCW. WSR 14-20-050, § 16-302-800, filed 9/25/14, effective 10/26/14.]