Do you enjoy the tranquility of a lily pond? Water lilies appear delicate, but don’t let their exotic aura fool you. These flowers are as tough as they are beautiful. Water lilies grow well in any USDA hardiness zone. Water lilies can be grown in a tub on the patio or in ponds of any size. They grow from tubers planted in pots beneath the water and send up stems with rounded leaves and star-shaped blossoms that float on the surface. They are daytime bloomers, blossoming in the morning and closing after sunset. The blooms last about three days before sinking beneath the surface. In winter climates hardy water lilies go dormant and can be left in the water. Tropical water lilies bloom with vibrant, almost electric colors but must be removed and stored if water temperature is lower than 70 degrees F.