Water regularly, especially during dry spells, ensuring the soil dries slightly between waterings. Avoid overwatering, as Penstemon barbatus prefers well-drained conditions.

Established plants are quite drought-tolerant, so focus watering on young plants and during prolonged periods of no rainfall.

Deadhead spent flower spikes to encourage continuous blooming and maintain a tidy appearance. Cut back flowering stems by about one-third in late autumn or early spring to promote vigorous new growth.

Remove any dead or damaged foliage as needed.

Propagate by seed sown in autumn or early spring, or by stem cuttings taken in late spring or early summer. Seeds may require stratification.

Cuttings should be rooted in a well-draining medium in a protected environment.

Repot seedlings or divisions in spring when they have outgrown their current container or space. Choose a pot with drainage holes and use a light, well-draining potting mix.

Water gently after repotting to help settle the soil.