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i have an hydrange which has now got a lot of white stuff on the whole of the plant,could you tell me what it is. thank you



Does the white stuff look like fluffy bits stuck on? This is woolly aphid, a sort of greenfly in a sweater! Spray them off with a sharp burst of hose or spray with Provado Ultimate Bug Killer. If the white is a powdery substance on the leaves, it is mildew. Spray with a fungicide and prune to open out the centre so that air can circulate. If neither of back, below!!

1 Jul, 2010

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