Redwoods thrive in the Pacific Northwest but struggle in the Northeast's hot, humid summers, which promote fungal diseases (Cercospora, Kabatina). Growth is slow. A few specimens exist in botanical gardens (Rhode Island, Boston, Delaware, New York). Cold-hardy cultivar 'Hazel Smith' shows promise. Winter tolerance limit: ~-30°F with snow cover.
See sempervirens.org/non-native.htm for detailed article.
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