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From its namesake in England, Hever Castle, this buddleia has fragrant, pale purple flowers with orange throats May to frost, blooming on new wood. Rest assured, it is NOT self-seeding. 7'W x 6'T. The foliage is oblong gray-green, and silver beneath: with the pale bloom, an altogether soft coloring. Prune hard after the first frost.Minimum temperature: -10° F