Photinia Red Robin
I have a fairly new, but large, Red Robin, planted last autumn. It seemed healthy then but now the leaves have black blotches. Is this a form of blackspot, and if so, what is the best treatment? An older one nearby is fine.
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I have a fairly new, but large, Red Robin, planted last autumn. It seemed healthy then but now the leaves have black blotches. Is this a form of blackspot, and if so, what is the best treatment? An older one nearby is fine.
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Thanks, Verdun. Actually the new one is more sheltered than the old, but it is on the north side of a high fence, and the ground there can be wet - particularly recently!