Pruning brazilian waterweed stimulates vigorous growth by redirecting energy to new shoots and maintains its shape, preventing overgrowth that can hinder water flow and light penetration.

Pruning brazilian waterweed during Spring and Summer aligns with the species' active growth phase when it exhibits the most vigorous growth due to warmer temperatures and increased light availability. Pruning in Spring helps to maintain the desired shape and size of the plant, prevent overgrowth, and stimulate new, healthy growth, which can enhance the plant's aesthetic value if used in ornamental settings. Summer pruning ensures that any excessive growth which can lead to overcrowding and poor light penetration is kept in check, improving water circulation and reducing the risk of pests and diseases. Since brazilian waterweed does not have a specific flowering or fruiting period as it is primarily a vegetative plant, the focus is primarily on controlling its growth and ensuring a balance in the ecosystem where it is present. Furthermore, pruning during these seasons when the plant has a high metabolic rate promotes quick recovery and minimizes stress on the plant.