Idaho Becomes Final State in U.S. to Legalize Hemp Idaho’s Gov. Brad Little has signed a bill legalizing hemp production. The battle to legalize industrial hemp in Idaho has finally ended, as the state’s governor signed House Bill 126 into law on April 16. H.B. 126 legalizes the production, processing, research and transportation of industrial hemp with up to 0.3% tetrahydrocannabinol (THC) in Idaho, as previously reported by Some argued this, stating that legalizing the sale of hemp products containing up to 0.3% THC could make it more challenging to enforce the state’s cannabis laws. In contrast, others backed legalizing such sales, stating that residents are already driving to nearby states to purchase the products, the news outlet reported.