growing even one marijuana plant rather than being arrested and put in jail legal use of medical marijuana norml.org/laws/item/pennsylvania-penalties-2 Possession of under 30 grams still face criminal penalties Pennsylvania a misdemeanor that comes with a fine a misdemeanor that comes with a fine still face criminal penalties still face criminal penalties maximum fine of $500. Pennsylvania still face criminal penalties NORML still face criminal penalties 30 grams of marijuana