We grow both Hardy (perennial) and Tropical (annual) waterlilies for ponds and water features of all shapes and sizes. Most Tropical Waterlilies can survive all year in zones 9 and 10. Tropical waterlilies have a wider selection of colors to choose from and most have a larger spread than hardy waterlilies. Hardy waterlilies have the benefit of coming back each year. In addition to the beauty a waterlily will add to your water garden, waterlilies also provide cover to your water feature, which will help keep algae growth down and protect your fish from predators.