Gardening is something the vast majority of people do not and will not do. I don’t see the point anyway. If people grow their own there will be no black market and the gov can stop spending over a billion dollars per year not putting a dent in the black market.
There will be no tax windfall like the doper crowd tries to tell the naive, and the cost of social programs needed to deal with the further decay of the American people, will grow and law enforcement will have more to do, not less, because the drug culture will grow.