Isatis japonica
Family: Brassicaceae or Cruciferae
What it is like
Isatis japonica is a BIENNIAL. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers moist soil.
Height (m): 0
Where it is found
Rocks, dry slopes, rock streams and sandy shores of rivers and seas.
E. Asia - China, Siberia.
Conservation Status:
Countries/locations it is found in
How it is used
Food
Rating: 0
Medicine
Rating: 0
Other
Rating: 1
A green dye is obtained from the leaves.
Dye: Plants that provide dyes.
How it is grown
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.
Propagating it: 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.
Best place to grow: Cultivated Beds; East Wall. In. West Wall. In.
Habit: Biennial
Hardiness:
Growth:
Soil: Light (sandy), medium, heavy (clay)
Shade: No shade
Moisture: Moist