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Green Coating on Lion's Head Maple: Harmless Lichen

Lichen on Bark: Not a Disease

The greenish coating is lichen—a symbiotic algae/fungus organism that lives on bark. It does not parasitize the tree. As long as foliage is green and healthy, the tree is fine.

Basic Care

Water 1 in. weekly during dry spells.
Mulch 3 in. to conserve moisture.
No treatment for lichen needed.

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