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.
Onosma frutescens is a Perennial up to 0.30 metres tall.
It has miscellaneous uses.
The bristly stems and leaves can cause a good deal of irritation to the skin[
Limestone slopes and rocks to 1600 metres[
Requires a well-drained soil in full sun[
]. Prefers a deep rather rich sandy loam[
]. Best grown in a crevice in a rock garden or on a wall[
]. Tolerates hot dry conditions and also drought once it is established, but disliking winter wet[
]. Plants also dislike wet summers[
Hardy to about -15°c[
A very ornamental plant[
A red dye is obtained from the root. It is an alkanna substitute[
Seed - we have no information on this species but suggest sowing the seed in a greenhouse in early spring. Prick out the seedlings into individual pots as soon as they are large enough to handle and grow them on in the greenhouse for at least their first winter. Plant them out in early summer.
Cuttings in a frame in the summer. Shade them for the first 10 - 12 days[