All large duckweed is grown threw Aquaponics only with no chemicals at all.... Amazing plant loves to work and clean happy tanks and ponds... Feed to your animals.......polyrhizais aperennialaquatic plant usually growing in dense colonies, forming a mat on the water surface. Each plant is a smooth, round, flat disc 0.5 to 1.0cm wide. Its upper surface is mostly green, sometimes red, while the lower surface is dark red.[5]It produces several minute roots and a pouch containing male and female flowers. The top part dies in the fall and the plant often overwinters as aturion. The turion sinks to the bottom of the water body and stays in adormantphase, until water temperature reaches 15C. The turions then germinate on the bottom of the water body and start a new life cycle.[6]S. polyrhiza, living in ponds and slow-moving water bodies, differs developmentally from terrestrial plants inmorphologyandphysiology. It undergoes mainlyvegetativegrowth in spring and summer, forming newfronds.S. polyrhizararely flowers.[7]In fall and winter it switches into adormantphase represented by theturionsdue to nutrition starvation and freezing temperatures.[citation needed] S. polyrhizais an ideal system for biofuels, bioremediation, and carbon cycling due to its aspects of fast-growing, direct contact with media, and small genome size (~150 Mb).[4]A comprehensive genomic study ofS. polyrhizawas published in February 2014. The results provide insights into how this organism is adapted to rapid growth and an aquatic lifestyle.