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Observations reveal varying sensitivity to spring frost in tree species, suggesting management strategies.
Observations of effects of spring freezing of May 22-23, 1963, on 13 tree species in second- and third-year plantations near La Crosse, Wis., indicate the following sensitivity to frost injury: very sensitive, black walnut, white ash, and red oak; moderately sensitive, Norway spruce, white spruce, European latch; slightly sensitive, Austrian pine; not sensitive, five pine species, namely, jack, ponderosa, red, Scotch, and white pines; and a juniper, eastern redcedar. Some variation was noted in frost damage by altitude.
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J. H. Stoeckeler (1965) studied this question.
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