In midsummer if foliage becomes less than attractive, the plant may be cut back by two thirds or right to the ground. Fresh foliage will emerge and it will likely rebloom. Excellent in the front of a perennial bed, entry garden, as an accent plant and for long lasting cut flowers.

Should I prune Centaurea montana?

wide (5 cm), with reddish blue, thistle-like centers from late spring to early summer and usually blooms again in late summer - fall if plants are cut back hard after the first flush. ... Perfect for borders and beds, cottage gardens, prairie planting, coastal gardens and wildlife gardens.

How do you prune a mountain bluet?

Pinch back the growing tips of your mountain bluets by 1/2 to 2 inches with your fingernails to encourage bushier growth. Pinch back early in the spring in warmer climates and to maintain their natural bloom time in any climate. Pinch back to a node -- a swelling where new growth is set to emerge -- where possible.