Water Clover is a lucky charm of the pond.  Its delightful clover-shaped foliage floats over the ponds surface.  Water clover, a popular pond plant, is grown for its attractive foliage and easy care.  Grows in sun to part shade in moist soil or water to 4 inches deep.  It can reach 3-6 inches high with a running spread.  Zones 5-11.  You can winter over by bringing indoors and keeping it as a houseplant.

Buy water clover,hardy bog plant, here.