|C. x clandonensis a deciduous shrub has bright blue to purple flowers late in the summer that attracts butterflies. Flowers appear on new growth, so cut back hard to the ground early
each spring. Foliage is narrow and grey-green and
is mildly fragrant as are the flowers and stems.
Thrives in moderately fertile, well-drained soil, in full sun or part shade. Grows to 3' wide and 5' tall.