Mosses and Lichens

Soft green or gray-green growths coat the bark without parasitizing plant tissue or directly harming trees significantly. They indicate poor air circulation and excess moisture in the local microclimate around the plant. Improve ventilation through selective pruning and wider spacing between plants in the landscape. Usually harmless but signal conditions that may favor other diseases.

Good sanitation is your most effective tool against mosses and lichens. Remove and dispose of infected plant material, clean up fallen debris, and sterilize your pruning tools between plants. Reduce leaf wetness by watering at soil level and spacing plants for adequate air movement. These practices reduce the pathogen load in your garden over successive seasons.