I'd spray some serenade and liquid copper fungicide on plants afflicted with mold. Based on the formation of the plants I will guess you did not fertilize much during the vegging phase, and I would advise you to now use a bloom fert.I would use a little bit of nitrogen, but primarily you should focus on getting phosphorus and judging by the purple I see on some parts of the plant, potassium in there as well. An organic fert with NPK of 1-5-4 or thereabouts would be ideal.