Pickerel Rush (Pontederia cordata) has heart shaped foliage that is shiny and a dark green color. One of the favorites of pond owners. Easy to grow and hardy Zones 5-11. It grows in sun to part shade in moist soil or water up to 10 inches deep. So for the colder states this is truly a good plant for your water garden. It has large spikes of purple flowers that appear throughout the summer and requires little maintenance. It will grow to about 2 feet high and about 2 feet wide.
Available Purple Pickerel Rush here.