Also known as the Flamingo Plant or Java Dropwort, it's a popular favorite for Koi ponds since it is edible it makes a nutritious snack for hungry mouths (fish or human). Some gardeners recommend rotating two planters - keeping one in the pond for koi and another kept away from koi and allowed to grow back - to maintain a constant supply on hand.
Though it is a lovely ornamental plant, the Variegated Water Celery is fast growing so take care in placement and expect plenty of spread. When placed properly, the Variegated Water Celery makes an excellent ground cover and a great choice for bog filters. Plants will grow fastest in wet soil under direct sun. Zones 6 to 11.