In NY state home-grows will be legal starting in June of this year. That's 18 months after the first licensed retail sale. We're allowed three plants in flower and 3 immature plants per adult, with a max of double that per household. So in a home with 2 or more adults we can grow up to 12 plants at a time (6 in flower and 6 immature). Possession of over a pound, or 5 oz of concentrate, is still a misdemeanor, and 5 pounds is a felony (or 2 lb of concentrate), so I guess we're supposed to smoke it up quick so our stash doesn't get too big. On the street we can legally possess up to 3 oz (or 24g of concentrate). We're also allowed to give 3 oz. at a time as a gift.
As a practical matter, the newspaper says the popo are not raiding un-licensed dispensaries. Only the state Cannabis Control Board is raiding black-market dispos so far, and they're not making arrests, just confiscating inventory and putting a notice on the door with a number for snitchy neighbors to call when they open up for business again. They hit one unlicensed storefront dispo in my neighborhood, and they were open a couple days later.
Criminal records for anything that's now legal are being automatically expunged. Those of us charged with weed conspiracy are prolly outa luck though. Oh, well, with one foot in the grave already it won't really matter for me.