I think you might mean RR-5 zoning, which is 5 acre minimum Rural Residential. Now the funny thing about that is I have neighbors who grow hay on 5 acre lots and sell it, although I don't know how they make any money at that. No one cares at all about their "commercial" activity. Likewise if they sell some of the fruit from a tree or two.
OTOH let a pot farmer grow 300 or 400 lbs of weed, and suddenly it is "wrong" even though it takes less water to do that than to produce 5 acres of hay.
Now I don't grow pot or want to grow pot, but those who do should have the opportunity...
Dope does not = hay.
Dopers love dope, and cannot see the downsides, of which there are many. A doped out society is a loser, ruined, easy to control, on its way to oblivion society.