If a tree’s top growth is under threat, it may send out suckers from the lower part of its trunk in an effort to survive. This is often seen in ash trees that are under attack by emerald ash borers.

If tree trunk protection is needed against sunscald on thin-barked trees such as ash, birch, linden, red oak or maple, there is a much better way to go.

Small sprouts around tree trunks, known as suckers, can be a sign of stress. Here’s what to do. Beth Botts, Morton Arboretum, Chicago Tribune. Sun, November 14, 2021 at 11:00 AM UTC.