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Home → Publications → Climate Change / Assisted Migration → Provenance variation in phenology and cold hardiness of western hemlock seedlings

Provenance variation in phenology and cold hardiness of western hemlock seedlings

Kuser, J. E., Ching, K. K. 1980. Forest Science, Volume 26: 463-470
Journal Article
Transfer Guideline: Recommendation

Western North America

Seedlings from a range-wide sample of 20 western hemlock [ Tsuga heterophylla (Raf.) Sarg.] provenances showed much variation in phenology and cold hardiness at Corvallis, Oregon. Seedlings of northern, high-elevation, or Rocky Mountain provenances set and burst bud earlier and survived early frost and winter cold better than seedlings of southern, low elevation, or coastal provenances. A strong north-south cline was found in the variation among coastal provenances. A sample of three families per provenance revealed four cases of marked intraprovenance variation, two in bud-set date and two in cold survival.