Hardiness: Zone 3.
Size: up to 12-20"
Planting: Full sun.
Bloom time: June- Sept
‘Royal Candles’ is a bushy, upright, clump-forming perennial producing dense, slender spikes of star-shaped, deep blue-purple flowers from early to late summer. Attractive to butterflies, the flowers open from the base upward and sway above the bushy foliage mound of lance-shaped, deep green leaves.