Our pink dogwood is about 15 years old and I recently noticed that the tips of a number of leaves are turning from green to a very pale cream colour. Does anyone know what would be causing this? It did not bloom very well this spring, but the previous few years were among the best ever. I had attributed its improvement to the unusually hot dry springs and summers which had allowed it to recover from anthracnose blight after a number of years of doing rather poorly. I've now added a picture. The new leaves seem to emerge without the white tips. The white tips have now been there a couple of weeks, and have not yet curled or turned brown, but we've never seen this white before and it is on most large leaves.