Keep the soil consistently moist but not waterlogged. Water when the top 2-3 cm of soil feels dry. In hotter weather or if grown in containers, more frequent watering may be necessary.

Avoid letting the plant dry out completely, especially during establishment.

Prune after flowering to prevent self-seeding and to encourage a bushier growth habit. Remove any dead, damaged, or leggy stems at any time of year.

Cutting back the plant after the first flush of growth can promote a second, smaller harvest of leaves.

Easily propagated from seed sown in autumn or early spring. Alternatively, division of established clumps in spring or autumn is a reliable method.

Sow seeds thinly in pots or trays filled with moist seed compost and transplant seedlings when large enough to handle.

Young plants may benefit from repotting annually into slightly larger containers. Established plants in the ground rarely need repotting.

If growing in containers, repot every 2-3 years in spring to refresh the soil and manage root growth, typically into a pot 5-10 cm larger.