Sea couch prefers consistently moist soil, especially during its active growth period. Water regularly, allowing the top few centimeters of soil to dry slightly between waterings.

Reduce watering in winter when the plant is dormant, but do not let the soil become completely dry. Ensure good drainage to prevent root rot.

Prune sea couch in early spring before new growth emerges. Remove any dead, damaged, or diseased foliage from the previous year.

Cut back the plant to a few centimeters above the ground to encourage fresh, vigorous growth. This tidies the plant and prevents the buildup of old, decaying material.

Propagate sea couch by division in early spring. Carefully dig up the plant and divide the root ball into smaller sections, ensuring each section has healthy roots and shoots.

Replant the divisions immediately into well-draining soil. Alternatively, seeds can be sown in autumn or spring, but division is more reliable.

Repot sea couch every 2-3 years, or when it becomes root-bound, preferably in early spring. Choose a pot that is slightly larger than the current one and use a well-draining potting mix.

This provides fresh nutrients and adequate space for root development, promoting healthier and more robust growth.