I live in WA state and every summer I start plants inside b4 hand and trick into flowering by the beginning of july. That involves me bringing my plants (in no.15 pots) into a dark room for 12 hrs every night for 10 weeks with no mold/fungus issues. Harvest by the time kids go back to school. Granted my dark room is fully plumbed with ventilation and fans, but I think he could pull off a night in the garage with a little ventilation.