Nymphaea (Water Lily) is a genus of about 50 species of herbaceous aquatic perennials found worldwide that are grown for their incredibly pretty flowers. Winter-hardy water lilies are usually day-flowering and have flowers that float on the water. Tropical water lilies can be either day-flowering or night-flowering and generally hold their flowers well above the water.

The below hardy water lilies are profuse bloomers that work well in small, medium or large ponds. To promote more blooms, make sure you follow these rules:

• Select an adequate size container. Larger soil volume means bigger flowers and leaves.
• Position the water lily so that it receives at least 5 or more hours of direct sunlight. Some water lily varieties will bloom at a reduced rate in less sunlight.
• Regular fertilization will keep your water lily blooming and growing well.
• As a flower is spent, it should be pinched out to promote more flowering.
• Crowding and not dividing your water lilies lead to plants with few flowers. Dividing your lily is simple, and the best time to do this would be in the spring when the plant is just beginning to grow.

Blooming from early summer to early fall, these hardy water lilies do best in quiet water, so keep them away from fountains and waterfalls.