Q. Some of our maple trees barely developed leaves at all, or bore seemingly stunted leaves this year – and now are dropping them, in August no less. There also seems to be an early “fall” on other trees, not just maple, around the area. Is this related to our extremely mild winter and possibly a freeze or two after that? Robert Payne – Edgewood, WA
A. Trees that show early fall colors and drop (senescing) in August are showing signs of stress or disease. Healthy trees take their cue to change from day length. For most trees this cue is in the middle of September. Now the fact that your maple trees barely developed leaves and some were stunted is further indication of a problem. Other trees in your area showing early color may be responding to drought stress. Past weather will only influence early senescing as far as it has influenced the general health and vigor of the trees in question. I would have a certified professional look at your trees to determine the underlying cause of the stunted leaves and early leaf drop.