Report
Seasonal foliage discoloration and loss in Pacific Northwest conifer trees
Washington State University Extension fact sheet, 056E, Washington State University Extension
01/2022
DOI:
https://doi.org/10.7273/000002577
Handle:
https://hdl.handle.net/2376/120372
Abstract
A hallmark of fall is leaf color change and drop, which is a phenomenon predominantly associated with deciduous broadleaf trees. However, some foliage on evergreen conifers also turns shades of yellow and orange in the fall and is subsequently shed. This is particularly noticeable on western redcedar (Thuja plicata), where splotches of bright orange are highly visible and can causes alarm for homeowners and small forest landowners because it is mistaken for a forest or tree health issue. It is actually a normal, annual function that does not mean something is wrong with the tree. This publication explores the different foliage retention strategies of trees, the phenomenon of seasonal foliage loss on evergreen conifers and how it differs from deciduous trees, and other seasonal color variations in Pacific Northwest (PNW) conifers that may look unhealthy but are generally harmless.
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Details
- Title
- Seasonal foliage discoloration and loss in Pacific Northwest conifer trees
- Creators
- Kevin Zobrist
- Academic Unit
- Publications, WSU Extension
- Series
- Washington State University Extension fact sheet; 056E
- Publisher
- Washington State University Extension; Pullman, Washington
- Format
- pdf
- Identifiers
- 99900632634301842
- Copyright
- http://rightsstatements.org/vocab/CNE/1.0/
- Language
- English
- Resource Type
- Report