Not very long. Colorado legalised it in last election. The other states I'm not sure. I know MA just legalised for medical purposes. Good question. It should be legal anyway, it is not harmful and it grows right from the Earth like a gift from above!! It helps with so many things it's ridiculous. Cigarettes are WAY worse with all the chemicals in it like formaldehyde but THAT is legal? Or alcohol, it causes way more problems. This government's messed up.