Pin oak branches
50 yr old pin oak leaves never came out this year on some branches. Is this normal? Primarily on one side. Trunk looks good. Just the occasional summer slim flux.
Westchester County New York
Your pin oak (Quercus palustris) may be reacting to environmental stress such as a period of drought, hot weather in our area (which is at the southern end of their range), issues with the soil pH or the long absence of sun this spring and early this summer which has weakened many trees' ability to leaf properly. But a stressed pin oak is vulnerable to a broad array of pests and diseases that may be causing a creeping die back of the tree. There may be evidence of pests or disease further up this enormous tree than you can comfortably see. It would be wise to consult with a certified arborist who can examine the tree thoroughly and recommend any necessary action to save it.