Culver's root is imposing and elegant, with vertical spires of whitish blue flowers against dark foliage. Planted in full sun with humus-high soil that remains moist, they may reach a whopping 7 feet tall; where the soil is dryer, they stay a little more compact.
Large rounded heads of Orange Perfection phlox's salmon-orange flowers contrast well with the vertical light spikes of Culver's root in sunny borders.
DaylilyBright red and coppery selections of daylily make colorful companions for Culver's root.
SedumThe bright pink turning rusty red flat heads of Autumn Joy sedum provide a good foil for the vertical spikes of Culver's root in full sun.
AsterBlooming at the same time, Alma Potschke aster has full heads of bright cherry red daisies on tall stems that marry well with upright Culver's root.
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