Water Leucas alluaudii thoroughly when the top 2-3 cm of soil feels dry. Avoid overwatering, as this can lead to root rot. Allow the soil to dry out slightly between waterings.

Reduce watering frequency during the cooler, dormant months.

Prune Leucas alluaudii in early spring to shape the plant and encourage bushier growth. Remove dead or damaged stems at any time. Pinch back the tips of new shoots to promote a more compact form and abundant flowering.

Leucas alluaudii can be propagated from seeds sown in spring or from stem cuttings taken in late spring or early summer. Root cuttings in moist, well-draining potting mix, often benefiting from bottom heat and high humidity.

Repot Leucas alluaudii every 2-3 years, or when the plant becomes root-bound. Choose a pot one size larger than the current one. Use a well-draining potting mix. Repot in spring before the active growth period begins.