Keep Callitriche stagnalis consistently submerged in clean, still or slow-moving water. The roots should be anchored in substrate, but the foliage will float on the surface.

Avoid strong water currents, which can dislodge the plant and damage its delicate leaves. Ensure the water level remains stable.

Pruning is generally not required unless the plant becomes excessively dense and starts to shade out other aquatic life or impede water flow. You can trim back overgrown sections by gently removing stems with scissors.

Discard trimmings to prevent them from decaying and fouling the water.

Propagation is easily achieved through stem cuttings. Simply snip off healthy stems, about 5-10 cm long, and plant them into the substrate. They will quickly root and develop into new plants.

Division of larger clumps is also an effective method for multiplying your Pond Water-Starwort.

Repotting is rarely necessary as Callitriche stagnalis is a free-floating or loosely rooted aquatic plant.

If planted in a container, you can move it to a larger pot or replant divisions into the pond substrate if it outgrows its current location or becomes too dense. Ensure roots are covered.