Hi! So glad to hear from you. I've been wanting to post but its just such a busy time. Zinnias. Love them the most! They are so forgiving and easy to get growing. They are an annual so they don't last forever. The more you trim and cut them back the better they do. They will for sure get moldy and mildew from overhead watering. It does not effect the actual plants so either cut them way back and see what happens or yank them out and put something fresh in. If you have heads that are drying out you can "deadhead" them and just drop the seed heads, they will probably come back next season. They are quick to grow so they might even come back this year. Have any pictures to share?