Annual Water Lilies are the vibrant stars of the water garden with colors that are rich and saturated. They produce an abundance of flowers all summer long. All Water Lilies come in various sizes from dwarf to very large. The type determines which size planting container is required. Large containers encourage healthy plants and increased flowering. Water Lilies love sunlight, heavy loam soil, a good amount of slow release fertilizer, and little or no stone material near the rhizomes which is a common issue when they don't grow well. Zone 8.