Thalia geniculata thrives in consistently moist to wet conditions, mimicking its natural boggy habitat. Water regularly, ensuring the soil never dries out completely.

In pond settings, it should be submerged at the roots. Reduce watering slightly in cooler months but maintain damp soil.

Pruning is primarily for aesthetic purposes and to remove dead or damaged foliage. Cut back any yellowed or brown leaves at the base of the plant.

Remove spent flower stalks after blooming to encourage further flower production and maintain a tidy appearance. Do this in late winter or early spring.

Thalia geniculata is easily propagated by division or seed. Division is best done in spring by digging up the plant and separating the rhizomes into smaller sections, each with at least one growth bud.

Seeds can be sown in moist soil or water in spring or summer.

Repotting is usually only necessary when the plant becomes overcrowded or outgrows its container. This is best done in spring.

If grown in a pot, gently remove the plant, divide any overgrown clumps, and replant in fresh, heavy garden soil or aquatic planting medium. Ensure adequate space for root growth.