Research Branch

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Guidelines for Seed Transfer of Western White Pine in B.C. Based on Frost Hardiness

Author(s) or contact(s): B.R. Thomas, D.T. Lester, and J. Worrall
Source: Research Branch
Subject: Seedling Performance
Series: FRDA Report
Other details:  Published 1990. Hardcopy is available.


Thirty-four seedlots of western white pine (Pinus monticola Doug. ex. D. Don) were tested for frost hardiness to determine guidelines for seed transfer. Twenty-nine seedlots represented the coast and interior of British Columbia (BC), two were from coastal United States (US) and three from interior US. Detached needles were exposed to a series of freezing temperatures in a programmable freezer and relative hardiness was calculated as the length of injured needle expressed as a percentage of total needle length 10 days after freezing. Seasonal progress is hardening was tested using five dates in the autumn of 1989.

FRDA Research Report 125 (901 KB)

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Updated July 24, 2015