There are several varieties of the Taro or elephant ear plant that make exceptional marginal plants for garden ponds, grown solely for their foliage.
The violet stemmed Black Magic plant, Cikicasua esculenta, is deep purple, almost black with black leaves that grow 2-3 feet in length and can take partial shade. These plants can be striking against an otherwise variant green landscape.
Nancy's Revenge has a white center and grows to 3 feet and also does well when grown in a pot as a house plant.
Green Taro grows to 3 feet and is recognized by its characteristic leaf that resembles an elephant's ear.
Ruffles Taro is just another version of the plant but its leaves are very ruffled at the edges.
The Imperial Taro has dark green leaves that are long with white veins.
The Harlequin Taro can live in partial to full shade, in zones 9 to 11 and will grow to 5-8 feet tall. Grow in pots no more than 6 inches below the water surface.
An emergent plant with broad leaves in contrast to the rushes, reeds, and irises these plants should all be planted in pots, placed in your pond with about an inch of water over the top of the pot. The main reasons to plant these in pots are that, in the tropics they can easily take over wherever planted and will be next to impossible to eradicate. In the Northern climes, the plant needs to be taken indoors for the winter because they are a tropical plant.
The Taro or Elephant Ear plants make a great addition to the garden pond adding different colors and textures and almost make the pond seem as a tropical get-a-way. What a great way to think of your pond.