Pickerel weed best grows best submerged in water, it best flourishes best in a variety of soils and terrain but best thrives best under moist conditions. It grows well when its roots are allowed to reach down into the shallow pools of standing water.  This plant also resists the growth of algae best, making it a good choice to use as ground cover near ponds or lakes. It is excellent for preventing soil erosion while flooding occurs or during high rainfall periods, which is why it's one of the favorite best plants for flood prone areas.