Maintain consistently moist substrate, mimicking swampy conditions. Avoid letting the roots dry out completely, as this aquatic fern thrives in wet environments.

For free-floating specimens, ensure the water is clean and replenished regularly to prevent stagnation and disease.

Pruning is generally not required for Ceratopteris pteridoides as it is an annual or short-lived perennial. If any fronds become yellow, brown, or damaged, they can be carefully removed to improve the plant's appearance and direct energy to new growth.

Propagation is primarily through spores or by detaching plantlets that form on mature fronds. Simply allow these plantlets to develop roots in water or moist substrate, and then they can be separated and grown as new individuals.

Repotting is typically not necessary as it is often grown as a floating aquatic plant or in very shallow water. If grown in a container, it may benefit from a refresh of its substrate annually, especially if the nutrients are depleted, but true repotting is rare.