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Leaf drop on escallonia

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Pat McCaffrey asked 14 years ago

I have a 30yd 7ft high erscollonia screening hedge. During the summer the leaves developed a black spot and turned partially yellow. Leaf drop then occurred and the hedge has now lost about 75% of its leaves. As I wish to mantain the screen, how can I get the leaves growing again?

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Gerry Daly Staff answered 6 years ago
Escallonia leaf spot is a relatively new disease that has become widespread in recent years. It appears to be quite virulent and causes severe defoliation and weakening, leading to death, of plants. It is worst in a wet summer and in high rain-fall areas.

It would appear to be a Mycosphaerella or related Septoria leafspot. 

Escallonia leaf spot is here to stay and will continue to be a problem. True, it is worse in wet years, but only worse not absent. Try applying a fertiliser with high potash that might harden the leaves but it is unlikely to do much and spraying is not a solution, as it is not possible to spray large bushes, or to spray often enough for control.

If there is no improvement, you will have to consider replacement.

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