Full sun to part shade
Summer. Deadheading will prolong bloom period.
Not fussy as long as not poorly drained
18 to 30 inches
Very hardy. Zone 3.
Mixed borders. cut flower
Easy and long lived. Late to emerge in the spring. Division not needed and somewhat difficult.
This is an old-time favorite. Star-shaped blue flowers appear in July and August on plants about 20 inches tall. They are ideal for the middle of the border. Their later bloom period is a plus in the perennial border. Balloon flowers are somewhat slow to get started but once established, they will last a lifetime.