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Why does bark shed off trees and what are signs of unhealthy plants?

  • Aniya Faulcon
State Street in Lancaster on August 4, 2022.

 Jeremy Long / WITF

State Street in Lancaster on August 4, 2022.

Airdate: October 25, 2022

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Many may have wondered why bark is shedding off their trees. Now that flowers and leaves are dropping this season, it is making this issue more noticeable.

George Weigel, Garden Columnist for the Patriot-News and PennLive and retired horticulturist, said for some tree species, like kousa dogwood, sycamore, or birch, shedding is normal but for others it’s a sign of a dying or unhealthy tree.

He advised not to cut down shredding trees that look like they’re dying until the spring to see if it regains its health.

“When it comes down to actually killing trees, it’s mainly the (emerald ash) borers, the things that you can’t see,” Weigel said. “But also the weather, we’ve had a real hot, dry summer. Anything new would have been under risk unless you kept it watered.  So, you really need to stay on top of the water.”

Weigel said, signs of other unhealthy plants are wilting, leaf spotting, dropping leaves, change in color and more. He also said, it’s important for people to be prepared to water their plants effectively, as the climate sometimes gets dry in October and November.

“I wouldn’t say growing plants is ever easy, but the more you know, the better you get at it. So, you can sidestep or prevent some of these problems or at least know what to do about it,” Weigel said. “Ican be frustrating, especially for beginners, but keep at it. There’s no such thing as a green thumb. It’s really the more you know, the better you get. “

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