Garden Q&A: What’s growing on this tree bark?

Lichens survive in a very wide range of habitats worldwide. Amazingly, more than 400 species can be found in Maryland.
The Press of Atlantic City

Lichen won't harm tree, but may be sign of problems

The lichen themselves will not cause decline, but they may be a good indicator of the overall health of your tree. An abundance lichen presence concentrated on damaged or dead wood, as your sample ...
Uticaod

Gardening tip: How to spot lichens and when to leave them alone

Gardeners and homeowners often contact our Horticulture Hotline at Cornell Cooperative Extension in Oriskany when they notice a grayish blue-green crusty or mossy looking growth on trees, shrubs, ...
The Daily Item

Lichens: Friend or foe killing your tree

I answer a lot of questions from home gardeners on our Garden Hotline. Quite a few questions deal with lichens. The resident asks, “Are they killing my tree?” Lichens (pronounced lie-kenz) have been ...