What is going wrong with my Rhododendrons
I have two 3 year old Unique Rhododendrons that have been turning yellow over the past year. They bloomed wonderfully this year but the leaves are certainly telling me something is wrong. They do get quite a bit of shade where they are and are on a automatic sprinkler system. I fertilize with an acid loving fertilizer twice a year. I just recently applied a liquid iron fertilizer but that did not help.
We have great soil, never had a issue before.