Tough, easy-to-grow perennial that performs best in full sun. With regular deadheading, Centaurea will bloom much of the summer with flowers that resemble Bachelor Buttons. Tolerant of heat, drought, and poor soil. Amethyst Dream has deep purple flowers from June - August on soft silver foliage forming 2 foot clumps. H 20" x W 27". Zone 3-9 hardiness.