crape myrtle sick? dying ? help please.
I have 2 crape myrtles with yellowing leaves. One with a white powder on it's buds.
The first one is a 15 ft crape (I think it's Miami). It has one branch with yellow , withering leaves and buds.
The second one is a Pink Velour I just planted a few months ago. It is about 4 ft tall. It has yellow leaves that are dropping off. most of the yellow leaves are yellowing inside the tree. the leaves on the outside are okay.
The last one (I'll put a photo up tomorrow) is an older Pink Velour with white powder on it's buds.
All of this yellowing / withering and white powder seems to have happened in the past 2 weeks. All the plants looked healthy up until recent weeks.
Can someone please give me some advice? I've never seen this before so I have no idea what's going on... what caused this and how can I prevent this from happening again?