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Rose Mildew

I have 2 roses in a half barrel facing south. One is Dorothy Perkins and covered in mildew. It is growing slowly I have sprayed with Rose clear but no good? The other rose is perfect growing better. What can I use on the mildew? Ita Magnolia, Cahir, Co Tipperary Posted: 17/05/2016

Roses do not grow well in a tub and are prone to disease, spraying cannot counteract this fully.

Best to plant them out in the open soil or make a hole in paving to give them free root run. 



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