On my rhododendron tree or bush, which is about 8 ft high and maybe 6 ft in diameter, the leaves are turning light brown, dark brown and a little white. I trimmed it last year because it was out of control. Previous to the trim, it looked fine and flowered nicely. It's not looking too healthy right now, so what's up?
Certified GKH Gardening Expert
If you water and fertilize this rhododendron, one possibility is overwatering or overfertilization- after pruning, it would need less of both, and too much could be harmful.
Cold winter temperatures could have also damaged your shrub. This may not have anything to do with pruning. If it still has some green leaves, it will probably recover.