Eleocharis

This is a group of aquatic, rush-like perennials. Some grow naturally along the edges of ponds and others grow completely submerged. E. acicularis, Hair Grass, is a hardy variety native to North America, Asia and Europe. It has pale green, needle-like leaves, up to 8 inches in length. This plant spreads vigorously by means of rhizomes and care must be taken that it doesn't choke out other submerged plants. E. montevidensis, Spike Rush, is a handsome plant that grows from 6 to 12 inches high. This grass-like plant is equipped with tiny, round pokers on its tips. This plant can be used as a filler plant in the pots of tall plants. E. tuberosa, Chinese Water Chestnut, has bright green, hollow stems that grow up to 2 feet high. It produces edible tubers that are widely used in Chinese cuisine.

Pot Cultivation

Hair Grass is grown completely submerged underneath the water. The Spike Rush is grown in 1- or 2-gallon containers and covered with up to 2 inches of water. They need a sunny or partially shaded place to grow in. It doesn't like to be transplanted and will take a few days to recuperate. The Chinese Water Chestnut should be grown in containers of fertile soil under 6 inches of water. The tubers are ready for use after about 6 months. This plant is hardy in the milder parts of North America.