Research Branch

See below to download.

Black Cottonwood - A Nurse Species for Regenerating Western Redcedar on Brushy Sites

Author(s) or contact(s): D.S. McLennan and K. Klinka
Source: Research Branch
Subject: Vegetation Management
Series: FRDA Report
Other details:  Published 1990. Hardcopy is available.


Regeneration of coniferous crop species on high-brush hazard sites in the Vancouver Forest Region is complicated by vigorous regrowth of deciduous trees and shrubs following harvesting. Brush control measures applied on these sites are expensive and the use of herbicides is often restricted because of site proximity to watercourses or conflicts with other resource values. An alternative approach to regenerating western redcedar is to create mixed plantations that mimic the black cottonwood or red alder communities that develop during primary or secondary succession on these sites. The approach described in this report uses a nurse tree regeneration method where the shading effect of rapidly growing black cottonwood saplings suppresses the vigour of shade-intolerant shrubs, thus providing marginal growth conditions for shade-tolerant conifers such as western redcedar.

FRDA Research Report 114 (1503 KB)

To view this document you need the current version of
Adobe Acrobat Reader, available free from the Adobe Web Site.

Updated July 24, 2015