Water chestnuts are easy to grow in any container that holds water, place a pot or two in an existing pond and reap the rewards of a crunchy edible corm, harvested in autumn. The larger the growing area for the plants, the more corms that are produced. Available for sale at garden centres where water plants are sold these reed-like plants not only create a habitat for frogs they are super tasty when harvested fresh. They will maintain a sweet delicate coconut flavour with a crunchy apple texture.
Place in medium sized pots and submerge in water, a bog garden situation is ideal or a bowl water garden will produce the most corms if growing in a sunny position.
Corms are produced underground and require approximately, 210-220 warm frost-free days to produce corms of a decent size. As the weather cools down the plants will die back.
Harvest about 4 weeks after the plant has died back as this will allow the best flavour to develop. Small corms can be replanted immediately and will remain dormant until the weather warms up again in spring. As shoots appear return to the water garden position again.