Lichens on Tree Trunks: Control with Kocide 2000 and Fertilize

Green “moss” on trunks is lichens (algae + fungus). They don’t kill trees but indicate declining vigor.

Control

Kocide DF is discontinued. Use Kocide 2000 or similar copper-based product from a nursery. Follow label.

Fertilize with 10-10-10 at 1 lb per inch trunk diameter, scattered and watered in (apply before rain).

Plant Diseases: Lichen Growth on Rose of Sharon: Harmless or Harmful?; Plum Tree Jelly Exudate: Borer Activity and Organic Needle Treatment; Aphids and Lichens on Trees: Dual Management Approach; Gray Clumps on Oak Trees: Moss, Lichen, or Something Killing the Tree?; Managing Moss in a Shady, Cool-Climate Lawn; Lichens on Weeping Cherry: Harmless Indicators of Thin Canopy; Controlling Spanish Moss in Pecan Trees; Apple Tree Regrowth from Root Sprouts and Moss Control in Garden Beds; Moss Under Oak Tree: Mulch, Don't Fight; Managing Moss in Pavers and Organic Fertilizer Alternatives

Garden Articles

Plants