Azure Penstemon prefers well-drained soil and should be watered moderately when the top inch of soil feels dry. Avoid overwatering, especially in cooler months, as this can lead to root rot.

Consistent moisture during dry periods will encourage continuous blooming throughout the growing season.

After the main flush of blooms has faded, deadhead spent flowers to encourage a second bloom.

In late fall or early spring, prune back the plant to about 10-15 cm above the ground to maintain a tidy shape and promote vigorous new growth. Remove any dead or damaged stems.

Azure Penstemon can be propagated from seed sown in fall or early spring, or through stem cuttings taken in early summer. Seeds may benefit from a period of cold stratification.

Cuttings should be rooted in a well-draining medium. Both methods require patience for establishment.

Repotting is rarely necessary for Azure Penstemon, as it prefers to be slightly root-bound.

If grown in containers, repot into a slightly larger pot only when the plant has clearly outgrown its current one, typically every 2-3 years. Use a well-draining potting mix.