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From late summer into autumn, this suckering shrub with glossy green leaves produces long, and long-lasting lavender-purple, downward-pointing flower spikes — a fountain! Just clip off those suckers as a matter of course so that you can enjoy the wonderful flowers. Or plant it where suckers will be okay and you'll delight in its growing presence.
Mature size: 6-12 ft T x WMinimum temperature: 0° F