Giant Duckweed (Spirodela polyrhiza) Growing Instructions
It is a very easy plant to grow indoors and outdoors. To grow Common Duckweed indoors, cover the outside of the aquarium with black contact paper. Install an airstone and a small pump at its lowest speed to oxygenate the water. Fill the aquarium with pond water or, if pond water is not available to you, use tap water. Let the tap water stand overnight so the chlorine evaporates. To grow Common Duckweed in a garden pond, be sure to monitor its growth. Duckweed spreads so rapidly that it can deprive ponds of oxygen so you have to monitor it regularly either it can cause harm to the fishes of the pond. To maintain the health of one's pond and aquatic life, learn to prevent such dangerous spread as early in spring as possible. Ponds set in motion by the wind or calmly moving waters prevent fewer problems and require less duckweed control. Full sun is needed for best results, but the plant will tolerate low to high light and soft or hard water. Common Duckweed is adaptable to temperature.