Pest
Gall mites / galls
How to recognise it
Striking growths, pimples or felt on leaves.
What helps
Mostly cosmetic – remove affected leaves or buds; plants usually cope well.
Often a care issue is behind it (watering, light, placement) – the care check in the app helps narrow it down.
Not sure it's this?
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Check a photo – freeTypical organisms: Eriophyes tiliae, Aculus fockeui, Colomerus vitis, Cecidophyopsis ribis