Pruning harlequin flower encourages a more abundant bloom display, invigorates vigorous growth, and helps maintain its desired form, ensuring an aesthetically pleasing appearance in the garden.

Pruning or trimming harlequin flower is best undertaken in the late summer or fall seasons, after the flowering period has concluded. During this time, the plant has already expended its energy on producing blooms and is entering its dormancy phase, rendering it an ideal time to trim without disrupting blooming. Pruning in late summer allows gardeners to remove spent flowers, which can enhance the plant's overall vigor and prepare it for the next growth cycle. Fall pruning is optimal for shape maintenance and removal of any dead or diseased foliage, which helps prevent potential infestations and diseases and promotes healthier growth in the coming spring. These practices align with the natural dieback of the plant's foliage as it prepares for winter dormancy. Avoid pruning harlequin flower in the spring or early summer because it may interfere with the development of flower buds and reduce the plant's blooming potential for that season.