When we see something weird growing on tree bark, it is usually algae, lichens, moss, or fungi (or a combination of these). These can be gray, white, green, or even orange.

One of the trees has about half the bark missing from the trunk and sort of circular looking lesions that ooze sap in the area missing the bark (see the photos I have included). Any advice would ...

Answer: That orange growth is lichen, not a rust pathogen. Lichen do not harm the tree or shrub in any way. They tend to grow only on that outer bark and stay there, not growing deeper into live ...

It’s a normal growth found on sweetgum trees. This corky-like growth is more common on some sweetgums than others. Almost anything you read about this tree will include information on this growth.

After damaged trees have had several weeks or months to produce new bark they will probably respond to fertilizer and produce normal top growth. There are several ways to keep this area weed-free ...

Bark beetle infestation slows down tree growth early on. ScienceDaily . Retrieved June 11, 2025 from www.sciencedaily.com / releases / 2025 / 02 / 250226142238.htm ...

Q. My 20-something-old redbud tree has developed lichens on the trunk, which is a first. Do I have a problem and is there anything I should do? I have another one in the yard which doesn’t have ...