growing Cherokee purples in old shower stall in basement ,I bought this cool grow light at a yard sale for $20 its amazing (I think the guy had been growing something else and his wife sold his stuff.) anyway they are about 3.5-4ft tall and full , have humidifier in stall but didn't cover top so it moves air and keeps hum. at around 70-80 % they all have blooms what should be my next step do I need to pollinate them by hand?