Pedunculate Water-starwort thrives in consistently moist to submerged conditions. Maintain substrate saturation, or submerge the plant in shallow, still water no deeper than 5 cm.

Avoid letting the substrate dry out completely, as this can stress the plant and lead to wilting. Regular checks are essential.

Pruning is minimal for Callitriche brutia. Remove any decaying or damaged foliage promptly to maintain water quality and prevent disease.

Trimming is usually only necessary to manage its spread in planted setups, which is uncommon due to its relatively small size.

Propagation is typically achieved through fragmentation. Healthy stems can be gently separated or cut into smaller sections.

Each viable piece, containing at least a few leaves and a node, will root and grow into a new plant when placed in suitable moist or submerged conditions.

Repotting is generally not a concern for this species as it is an aquatic or semi-aquatic plant. If grown in a container, ensure the substrate remains waterlogged.

If it outgrows its allocated space, it can be divided or simply allowed to spread, as it does not develop a large root ball.