Putting a water garden in your landscape adds another dimension to your yard. It can be as simple as a watertight container or as complex as a manufactured pond, replete with a waterfall. Whatever type of water garden you are creating and no matter what your local climate is, there are water plants that you can grow successfully in your yard.
The water poppy (Hydrocleys nymphoides) is a tropical water plant and will only survive in areas without frost. The water poppy prefers shallow waters about 6 inches deep but will survive in water up to 15 inches deep. It has heart-shaped leaves about 3 inches wide and small yellow flowers that are short lived. The flowers stand up above the surface of the water. If growing in cold weather areas, overwinter in pots in a frost-free location.
Water hyacinth (Eichornia crassipes) are water plants that can be successfully grown in USDA Hardiness Zones 8-11. They grow pale blue to lavender flowers on 6-inch spikes. Water hyacinths grow in full sun with warm air and water temperatures. This species can become invasive if its spread is not prevented, spreading by root stolons. To prevent its spread, grow in pots placed on the bottom of your water garden.
Floating heart (Nymphoides pelatum) are slightly hardy water plants, growing successfully in USDA Hardiness Zones 5-10. The leaves float on the surface of the water. It can be invasive; plant in gallon-size pots and sink to the bottom of the water garden covered with 12 to 24 inches of water. It produces golden yellow flowers that are rather short-lived.