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Can anyone tell me what the powdery residue is on some of my plants, is it harmful and how do I get rid of it?

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Its mildew. One of the regulars on here suggests spraying with one part milk to ten parts water (I think it was full cream milk!) I think your first plant in the picture is an Acanthus - mine looks exactly the same, every year unfortunately.

16 Jun, 2013


Mildew sometimes attacks plants when they are dry at the roots & cold or wet on the leaves.

17 Jun, 2013


Many thanks for your replies.

17 Jun, 2013

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