A long bloomer, from midsummer through September, 2- to 3-foot Agastache ‘Black Adder’ “has the always-pleasant lavender-purple color that goes so well ‘out East.’” A magnet for butterflies and other nectar-seeking insects, the foliage and flowers also release a minty fragrance when brushed against.
Adding a “nice red spark” to the garden from July through October, Persicaria amplexicaulis ‘Firetail’ forms a bushy mound of handsome foliage with distinctive markings, topped by brightly colored “tails” of tiny crimson flowers.
Producing thick clumps of stems from underground stolons, Pycnanthemum muticum “creates a massed volume in the garden, and its silver-gray foliage and almost-white flowers contrast with the grasses.” A tough plant, it takes to wet or dry conditions, sun to part shade.
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