Five years ago, on the basis of its anticipated rich autumn colouring we bought a claret ash. At the time we planted it, it was changing to the deep red we expected to see every April/May. But alas this was not to be. Ever since that first year, the foliage has remained green and refused to change colour before falling. Once again this year the same thing is happening – while other claret ash in the district have turned beautifully red. Why might this be so?
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