Water regularly, keeping the soil consistently moist but not waterlogged. Allow the top inch of soil to dry out slightly between waterings, especially during the growing season.

Reduce watering in winter when the plant is dormant, but ensure the soil does not become completely dry.

Deadhead spent flowers regularly to encourage further blooming and prevent seed formation. Cut back the main stems after flowering to tidy the plant and promote a more compact habit.

In late autumn or early spring, cut back any dead or damaged foliage to the ground.

Delphinium fissum can be propagated by division of clumps in early spring or autumn. Carefully lift the plant and divide the root ball into sections, each with at least one eye or shoot.

Replant divisions immediately into well-prepared soil.

Repot young plants annually or biennially in spring into slightly larger containers. Mature plants typically do not require frequent repotting and are often best planted directly in the garden.

If repotting is necessary, use a well-draining potting mix.