Cedar Flagging
Evergreen plants
17 host plants
Last updated
Data Coverage 3 of 6 dimensions
Cedar flagging causes tip dieback on conifer branches, creating a browning or reddened appearance. You notice discolored branch tips that die back, leaving thin, bare branches. The condition may be environmental or disease-related. Prune out affected branches and provide proper tree care.
Additional irrigation may be needed during summer drought. Avoid disturbing soil, and thus roots, near plantings.
Quick Reference
Causal Agent
Evergreen plants
Host Plants
17
Management
Vulnerability Window
Brown foliage develops on the tree or shrub in mid- to late summer and is very obvious by early fall | Most of the dead foliage is blown out of the plant by the wind in fall and winter, and the plant typ
Cultural Controls
- Additional irrigation may be needed during summer drought.
- Avoid disturbing soil, and thus roots, near plantings.
- References Maton, C., and Gartner, B.L. 2005.
- Do gymnosperm needles pull water through the xylem produced in the same year as the needle? American Journal of Botany 92:123-131.
- Smith, L., Primack, R.B., Zipf, L., Pardo, S., Gallinat, A.S., and Panchen, Z.A. 2019.
- Leaf longevity in temperate evergreen species is related to phylogeny and leaf size.
Host Plants (17)
Callitropsis nootkatensis Alaska Cedar, Nootka Cypress, Nootka Falsecypress, Yellow Cedar Calocedrus decurrens Incense Cedar Cedrus atlantica Atlas Cedar Cedrus brevifolia Cyprus Cedar Cedrus deodara Deodar Cedar, Himalayan Cedar Cedrus libani Cedar, of Lebanon Cedrus libani subsp. brevifolia Cypress Cedar, Cyprian Cedar Chamaecyparis lawsoniana Port Orford Cedar Chamaecyparis thyoides White Cedar, Atlantic Whitecedar, Whitecedar Falsecypress Cryptomeria japonica Japanese Cedar Microbiota decussata Russian Arborvitae, Siberian Cypress Platycladus orientalis Chinese Arborvitae, Oriental Arborvitae Taiwania cryptomerioides Formosan Redwood Taiwan Cedar Taiwania, Coffin Tree Tamarix parviflora Small-flowered Tamarix, Salt Cedar Thujopsis dolabrata Elkhorn Cedar, Deerhorn Cedar, Hiba Arborvitae, False Arborvitae Widdringtonia nodiflora Berg Cypress Mountain Cypress, Mountain Cedar Widdringtonia schwarzii Willowmore Cedar