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Gaura with black spot what can I do?


Pics show the problem. The variety of Gaura is Sparkle White.
Any advice would be gratefully appreciated.
Many thanks
Richard
0
Posts
Thanks for your replies.
I have since found an American site which advised that under cool growing conditions dark coloured purple spots may develop on the leaves which is a physiological response (not a disease) and will disappear with warmer temperatures. Hopefully this will be the case up here in North East England.