Water Lily Nymphaea 'Pygmaea Helvola' Pond Plant 2Ltr PotPond Plants, Perennial In Bloom: Summer Position: Like full sun Eventual Size: Spread of 1. 5m Approx ORL Nymphaea are a hardy aquatic plant known most commonly as a water lily. a rhizomatous perennial with flowers rise out of the water and float on the surface of ponds. These are often accompanied by large disc shaped leaves than can quickly spread and cover large surface areas of water The plant's growth rate and size will vary depending on planting