How to prune penstemon barbatus 'rondo'

Mid-spring after new basal growth is established; deadhead throughout summer. Cut spent flower spikes back to a healthy lateral shoot or leaf node during the flowering season to encourage repeat bloom. In mid-spring, remove all old stems down to the fresh basal rosette of new growth emerging from ground level.

Cut back annually in spring; deadhead as needed through summer. Penstemon barbatus 'Rondo' benefits from deadheading spent spikes during summer to keep flowers coming. Leave old stems intact over winter to protect the crown, then cut back to healthy new basal growth in mid-spring. In mild climates, a light autumn tidy is fine, but avoid heavy pruning until spring growth confirms crown survival.

Cut spent flower spikes back to a healthy lateral shoot or leaf node during the flowering season to encourage repeat bloom. In mid-spring, remove all old stems down to the fresh basal rosette of new growth emerging from ground level.