When the director has cause to believe that any horticultural plants are damaged or are infested or infected by any plant pest, the director may issue a hold order on such horticultural plants. A hold order may prescribe conditions under which plants must be held to prevent spread of the infestation or infection. Treatment or other corrective measures shall be the sole responsibility of the persons holding the plant material for sale. It is unlawful to sell or move such plants until released in writing by the director.
RCW 15.13.430