Ask an Arborist: Why did the leaves fall off my Gingko trees before they turned yellow?
Q: The leaves dropped off my Ginkgo before they had a chance to turn yellow. Why?
A: The recent freezing temperatures that we experienced early this month came much sooner that what most of our trees are accustomed to.
This has been a very unusual year for North Texas weather. We have experienced record rainfall amounts this fall and we have already had at least two significant cold fronts that drastically changed our temperatures. Our normal average high during the first half of November is in the upper 60s to lower 70s. Average lows are normally upper 40s and lower 50s. The recent freezing temperatures that we experienced early this month came much sooner that what most of our trees are accustomed to. Basically, the rapid change in temperatures didn't allow time for your Gingkos' leaves to change and gradually fall off. The freezing temperatures caused the cellular structure in the leaves to fail, causing them to fall off immediately. However, on a positive note, this event won't impact the health of your Gingkos.
-Kenneth Smith, ISA Certified Arborist