Algae, lichens and moss on trees and shrubs / RHS Gardening

Algae, lichens and moss often form green or grey, powdery or mossy, crusty growths on the stems, branches and trunks of trees and shrubs. While this can worry gardeners, these growths are harmless, although may occasionally indicate a lack of vigour in the affected plant.

Managing Pests in Gardens: Environmental Factors: Lichens, Mosses and Algae—UC IPM

Tree lichen garden hi-res stock photography and images - Alamy

Those Lichens in Your Trees

Tree roots lichen hi-res stock photography and images - Alamy

Managing Pests in Gardens: Environmental Factors: Lichens, Mosses and Algae—UC IPM

Search the RHS website for gardening knowledge / RHS Gardening

52 On hold ideas rain quotes, rainy day quotes, grey gardens movie

Search the RHS website for gardening knowledge / RHS Gardening

All You Need to Know About Algae, Lichen and Moss on Trees - Tree Surgeons Essex, T.H Tree Services

Lichen sur les arbres: faut-il l'enlever ? Tous les conseils de culture des arbres fruitiers