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my gerainiums have black circles on the leave. can u tell me what is it and how can i get rid of it



What sort of Geranium is it?

11 Mar, 2011


Fractal is asking whether you mean Pelargonium geraniums (the summer ones with drumstick flowers which have to be kept inside in winter) or whether you mean proper Geranium, an outdoor perennial.

11 Mar, 2011


Indeed! I should have been clearer.

Just wanted to establish if they were the dark rings on Zonal Pelargoniums ("Pot Geraniums") or were something else? :-)

11 Mar, 2011


If they're Pelargoniums, it could be the beginning of botrytis (grey mould) so you'd have to remove the affected leaves and destroy them. In a greenhouse, the answer is to air it whenever you can - when it's mild enough to open the door for a few hours - and don't wet the leaves when you water the plants.

11 Mar, 2011


Could also be Geranium rust, if they are pelargoniums and they've been inside for the winter.

12 Mar, 2011

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