Troubleshooting
Rhododendron 'Pink Pearl' problems — and how to fix them
Rhododendron 'Pink Pearl' (Rhododendron 'Pink Pearl') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Lime-induced chlorosis
Yellow leaves with green veins indicate soil pH too high; correct with acidifying fertiliser or sulphur chips.
Bud blast
Buds turn brown and fail to open, often caused by leafhoppers spreading Pycnostysanus azaleae fungus; control leafhopper populations.
Vine weevil
Adults notch leaf margins; larvae eat roots and can kill plants. Apply nematode biological controls in late summer.
Powdery mildew
White powdery coating on leaves in dry summers; improve air circulation and avoid overhead watering.
Root rot (Phytophthora)
Caused by waterlogged soil; wilting and dieback follow. Ensure excellent drainage and never plant in poorly drained ground.
Prevent rhododendron 'pink pearl' problems before they start
Most rhododendron 'pink pearl' issues are care-mismatch, not bad luck. Dial in the basics:
Rhododendron 'Pink Pearl' problems — FAQ
Why is my rhododendron 'pink pearl' lime-induced chlorosis?
Yellow leaves with green veins indicate soil pH too high; correct with acidifying fertiliser or sulphur chips.
Why is my rhododendron 'pink pearl' bud blast?
Buds turn brown and fail to open, often caused by leafhoppers spreading Pycnostysanus azaleae fungus; control leafhopper populations.
Why is my rhododendron 'pink pearl' vine weevil?
Adults notch leaf margins; larvae eat roots and can kill plants. Apply nematode biological controls in late summer.
Why is my rhododendron 'pink pearl' powdery mildew?
White powdery coating on leaves in dry summers; improve air circulation and avoid overhead watering.
Why is my rhododendron 'pink pearl' root rot (phytophthora)?
Caused by waterlogged soil; wilting and dieback follow. Ensure excellent drainage and never plant in poorly drained ground.