How to prune penstemon 'raven'

Mid to late spring, once new growth is clearly visible. Cut each stem back to the lowest strong pair of new shoots in spring. Avoid cutting into leafless, bare wood which may not regenerate. Remove spent flower spikes through summer, cutting back to a lateral shoot or leaf node to encourage repeat blooming.

Annually (spring cut-back) plus regular deadheading in summer. Penstemon 'Raven' is a semi-evergreen subshrub that benefits from spring pruning and summer deadheading. Leave old stems intact over winter for frost protection, then cut back in mid-spring once new growth shows clearly. Remove dead or frost-damaged wood, cutting to healthy buds. Deadhead regularly for continuous flowering.

Cut each stem back to the lowest strong pair of new shoots in spring. Avoid cutting into leafless, bare wood which may not regenerate. Remove spent flower spikes through summer, cutting back to a lateral shoot or leaf node to encourage repeat blooming.