An oak tree in my yard has a large growth on it. It doesn’t seem to be hurting the tree, but should I be concerned? — B.I. It sounds like you are describing what is known as a burl. Burls are round or ...

Q: I am worried about the grayish-green, flaky, roundish spots I am seeing on big tree trunks and branches this spring. I can scratch it off with my fingernails. I think that it is killing my trees.

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 ...

Now that deciduous trees are bare, trunks and branches have taken center stage, and you might be noticing nuances and irregularities that evaded your attention over the summer. For instance, what are ...

Now that deciduous trees are bare, trunks and branches have taken center stage, and you might be noticing nuances and irregularities that evaded your attention over the summer. For instance, what are ...

EAST TEXAS (KLTV/KTRE) - Often is heard, “That green and grey fungus is killing my tree! See there? It’s all over those limbs!” The “fungus” referred to is probably lichen. Lichens are often blamed ...

What could possibly be inspiring about that green stuff covering Oregon’s trees? What could possibly be inspiring about that green stuff covering Oregon’s trees? Lichen is a an ecological wonder that ...