Gerry - I have 3 apple trees growning on a south facing wall. They are 4 years old. This year, for the 1st time, the leaves at the very end of some braches are looking witherd and have a greyish colour. What should I do.
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Over ten years, Gerry Daly answered more than 5,000 gardening questions. His knowledge is based in science and practical experience, and by working on radio and television. Access to the advice database is open
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