Penstemon fruticosus prefers consistently moist soil during its establishment phase. Once mature, it becomes quite drought-tolerant.

Water deeply but infrequently, allowing the soil to dry out slightly between waterings to prevent root rot. Reduce watering significantly in winter.

Prune after flowering to maintain a tidy shape and encourage a second bloom. Remove spent flower stalks and any dead or damaged stems.

Light annual pruning in late winter or early spring can also help promote bushier growth and remove winter damage.

Propagate by seeds sown in autumn or early spring, or by semi-hardwood cuttings taken in summer. Seeds may benefit from stratification.

Cuttings should be treated with rooting hormone and placed in a well-draining medium. Patience is key for success.

Repot young plants as needed, typically every 1-2 years, when they become root-bound. Use a well-draining potting mix. Mature plants are best left undisturbed in the ground.

Repotting is usually only necessary for nursery propagation or to rescue a struggling specimen.