Seeds of Wild Centaurea – this plant with attractive gray-green foliage about 1.5? high and wide. Low maintenance, low water ? this perennial Bachelor Button is shockingly rare in production. It forms loose clumps of blue-grey lance-shaped leaves with slender stems, from which large pure white flowers, with contrasting deep purple stamens, appear from late spring. Grow in well-drained soil in full sun to partial shade. Deadhead spent blooms to prolong flowering but do leave some at the end of the season as birds are fond of the seeds. Hardy in zones 6a to 11.