Plumeria leaves yellowing in summer
Hi! I have a plumeria that is approx 10 years old .It has been healthy all summer with beautiful white blooms. Now the leaves are turning a mottled yellow/green then all yellow. The flowers are healthy. It started off slowly with only a couple of leaves a day, but now it seems to be rapidly progressing with lots of leaves doing this. The plant shouldn't be going dormant in the summer. Any suggestions to what has happened? I fertilize it with Nutra Star plumeria food. I dont' see any insects on the leaves even with a microscope. Thanks for any help!