How to prune prairie penstemon

After flowering (late spring to early summer); early spring for clean-up. Remove finished flower stalks by cutting to the rosette base once blooms are done. In early spring, clear away dead or damaged rosette leaves. Avoid cutting into healthy green foliage as the rosette provides energy storage through winter.

Once after flowering; light clean-up in early spring. Prairie Penstemon requires only light pruning. Deadhead spent flower stalks after the main bloom period ends to keep plants tidy and reduce excessive self-seeding. Cut stalks back to the basal foliage rosette. The rosette is semi-evergreen; remove dead or frost-damaged leaves in early spring. Heavy or hard pruning is not necessary or beneficial.

Remove finished flower stalks by cutting to the rosette base once blooms are done. In early spring, clear away dead or damaged rosette leaves. Avoid cutting into healthy green foliage as the rosette provides energy storage through winter.