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Lichens on Weeping Cherry: Harmless Indicators of Thin Canopy

Green and whitish‑green growth on weeping cherry branches are lichens—symbiotic algae/fungi. They’re epiphytes (not parasites), getting nutrients from air. They indicate a thin canopy (more light = more lichen). Control: improve tree vigor with 10‑10‑10 fertilizer (1 lb per inch trunk diameter) to thicken canopy, which shades limbs and reduces lichen photosynthesis. No direct treatment needed.

Trees: Black Walnut Fern-Like Growth: Harmless Lichens, Not a Disease; Lichens on Trees: Harmless Indicators of Stress, Not Disease; Sugar Maple Lightning Strike and Lichens: Damage Assessment; Aphids and Lichens on Trees: Dual Management Approach; Gray Marshmallow Masses on Tree: Harmless Lichens; Lichens on Trees: Harmless Epiphytes or Hidden Threat?; Gray Fungus on Large Trees: Lichens, Not a Disease; Lichen on Red Oaks: Cosmetic, Not Harmful; Lichen on Orange Tree: Symptom, Not Cause; Apple Tree Regrowth from Root Sprouts and Moss Control in Garden Beds

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