Floating water plants are those that are not anchored by roots, although some do produce a few straggly roots that simply dangle in the water.
These plants tend to die down during late autumn, surviving the winter as dormant 'buds', resting in the mud at the bottom of the pond. In spring, when the weather warms, they burst into life again. Some floating plants increase their size and number rapidly and can cause overcrowding in the pond. It is for this reason that there is a restriction in the sale of such plants in some warmer climates, including some of the southern states of the USA, where the winters offer less of a check to their growth. For more information to visit : Fish Pond Netting