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.
Sium serra is a Perennial
It is harvested from the wild for local use as a food.
E. Asia - Japan.
Wet and marshy places[
], in central and northern Japan[
We have almost no information on this species and do not know if it will be hardy in Britain, though judging by its native range it should succeed outdoors in most parts of this country. The following notes are based on the general needs of the genus.
Prefers a light, rich, moisture retentive soil in full sun[
Plant - cooked[
]. The part of the plant is not specified.
Seed - sow late winter to early spring in a cold frame. The seed can be slow to germinate[
]. Prick out the seedlings into individual pots when they are large enough to handle and plant them out in the summer if they are large enough. Otherwise, grow them on in a cold frame for their first winter and plant them out in the following spring.
Division in early spring just before new growth begins. Use the side roots[
]. Larger divisions can be planted out direct into their permanent positions. We have found it best to pot up the smaller divisions and grow them on in a lightly shaded position in a cold frame, planting them out once they are well established in the summer.