(1) This chapter does not apply to amounts received by a person engaging within this state in the business of: (a) Making wholesale sales to farmers of seed conditioned for use in planting and not packaged for retail sale; or (b) conditioning seed for planting owned by others.
(2) For the purposes of this section, "seed" means seed potatoes and all other "agricultural seed" as defined in RCW 15.49.011. "Seed" does not include "flower seeds" or "vegetable seeds" as defined in RCW 15.49.011, or any other seeds or propagative portions of plants used to grow cannabis, ornamental flowers, or any type of bush, moss, fern, shrub, or tree.