I've grown this clematis for ~ 4 years--it gets better every year. This year it survived a bad winter with some uncharacteristic minus 1 ...Read More 4 degree nights! It blooms in March-April here and can manage in 30 degree changes of temp in a single day/night and in frequent 30 mph winds with gusts of 50 mph (lower part of plant on a trellis ... More @Wikipedia
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