The Temperate Database is in the process of being updated, with new records being added and old ones being checked and brought up to date where necessary. This record has not yet been checked and updated.
Common Name: Water Celery
Vallisneria americana is a Evergreen Perennial
It has uses.
E. Asia. Eastern N. America - N. Dakota to S. Manitoba and Quebec.
]. Lakes and slow flowing streams[
]. Fresh to brackish waters of streams, lakes, rivers, and bays from sea level to 500 metres[
A water plant for a large aquarium or for deep water outdoors[
], it prefers slightly acid conditions in a sunny position[
This species is not very hardy in Britain, though it should succeed outdoors in the mildest areas of the country[
A valuable water oxygenator[
The leaves can be up to 1 metre long[
Dioecious, male and female plants must be grown if seed is required. Male flowers are produced below the surface of the water and females are produced on the surface. Fertilization takes place when male flowers break off the plant, float to the surface and fall into a slight depression formed by the female flowers on the surface of the water[
Seed - we have no information on this species but suggest sowing the seed in a warm greenhouse as soon as it is ripe. Lay the seed on the surface of a pot of soil and immerse this in water. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in water in the greenhouse for their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.
Division of rooted runners in the growing season.