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Summary

Physical Characteristics

Onosma frutescens is a PERENNIAL growing to 0.3 m (1ft).
See above for USDA hardiness. It is hardy to UK zone 8. It is in flower from June to August. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects.
Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.

UK Hardiness Map US Hardiness Map

Synonyms

Plant Habitats

Cultivated Beds; South Wall. In. West Wall. In.

Edible Uses

None known

References More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

None known

References More on Medicinal Uses

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Other Uses

Dye

A red dye is obtained from the root. It is an alkanna substitute[46, 61].

Special Uses

References More on Other Uses

Cultivation details

Requires a well-drained soil in full sun[1, 187]. Prefers a deep rather rich sandy loam[1]. Best grown in a crevice in a rock garden or on a wall[1, 187]. Tolerates hot dry conditions and also drought once it is established, but disliking winter wet[190]. Plants also dislike wet summers[200]. Hardy to about -15°c[187]. A very ornamental plant[1].

References Carbon Farming Information and Carbon Sequestration Information

Temperature Converter

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Plant Propagation

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[1].

Other Names

If available other names are mentioned here

Native Range

Coming Soon

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so itâ€™s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants

Latin Name	Common Name	Habit	Height	Hardiness	Soil	Shade	Moisture	Edible	Medicinal	Other
Onosma bracteatum		Perennial	0.4	-	LM	N	DM	0	2	1
Onosma echioides	Onosma	Perennial	0.3	6-9	LM	N	DM	0	1	1
Onosma hispidum		Perennial	0.4	-	LM	N	DM	1	1

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

Onosma frutescens - Lam.