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Long wands of blue-purple flowers bloom an astonishingly long season — spring clear into fall — on a tough, adaptable plant that shrugs off cold to -20°F.
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A fast-growing native shade tree for streamsides and wet ground, with smooth pale bark and dangling catkins in late winter.
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Luminous silver-white foliage, intensely aromatic, with tall wands of pale flowers that hum with bees.

