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.
Isatis japonica is a Biennial
It is harvested from the wild for local use as a medicine..
E. Asia - China, Siberia.
Rocks, dry slopes, rock streams and sandy shores of rivers and seas[
We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it could succeed outdoors in many parts of this country. The following notes are based on the general needs of the genus.
Prefers a well-drained fertile soil in a sunny position[
]. Succeeds in ordinary garden soil[
A green dye is obtained from the leaves[
Seed - sow spring or autumn in situ[
If the seed is in short supply then it might be better to sow it in a cold frame in the spring. Prick out the seedlings into individual pots when they are large enough to handle, and plant out in early summer.