you might have mold do to much rain or humidity you might want to trim off the parts that are moldy and put some kinda cover over it to keep the moister off the buds.
well if your plants are only a month old you have a while tell you get bud and also you have them on 10/10 i have never heard of 10 hours of light and 10 hours of dark. you need to have it on 24/0 or 18/6 in vegie and when they are 8 weeks old you put them on 12/12