Centaurea montana 'Gold Bullion' (Perennial Bachelor Button)

Centaurea montana 'Gold Bullion' (Perennial Bachelor Button)
Vivid traditional blue cornflowers in May and June with a ring of fine blue outer florets surrounding a crowd of tiny deep reddish-purple flowers in center; the twist is the striking  downy, chartreuse foliage. Drought tolerant. Good butterfly plant. Prefers well-drained soil, spreads in moist soil. Full sun-part shade; plant in full sun for best foliage color. 12-15", Z3-8.