The National Labor Relations Board rejected a Missouri cannabis company’s bid to exclude workers who ready the plant for sale from a group who voted in a union election.

The NLRB on Thursday denied BeLeaf Medical LLC’s request to review an agency regional director’s determination that the workers involved in processing cannabis after harvest didn’t qualify as agricultural workers without organizing rights under federal labor law.

“The activities of the Post-Harvest employees generally are not performed by ordinary farm employees, and the activities in question have only an attenuated relationship to farming in the traditional sense,” the board said.

The …