I have three rhododendron which were planted at the same time in in the spring in nearly the same conditions about 6 feet apart from each other. The one in the middle is wilting the other two are fine.
Every leaf is wilted and rolled length wise and lighter green in color then I would expect.
They were planted on a mounded dirt to help with drainage and with leaf mold and soil from another place int the lawn. wood chips were placed over the top of the leaf mold; Not mulch but raw wood chips from an arborist. the soil in the area is nicely acidic. A neighbor has a huge seemingly 30′ tall rhododendron that is gorgeous so I think the conditions on the area are suitable for the plant.
It went from good looking to sick over three days.
– No visible to the naked eye bugs, pest, molds, etc seem to be on the plant now.
– It has been raining a lot this year but the soil seems generally dry enough so it is draining. So i don’t think it is an over watering or under watering issue.
-The leaves on the middle plant did have some minor darker spots when we bought them but it looked like a pattern in the leaf not a disease.
Any idea on what might be wrong or how to rescue it?