Common viper's bugloss is a biennial or short-lived perennial wildflower with bristly leaves and spikes of flowers that open pink and turn vivid blue. It is grown as an ornamental and does best in full sun and dry, well-drained soil.
Family
Boraginaceae (Borage family)
Grows as
Annual
Light
Full sun
Water
Water sparingly and let the soil dry out between waterings.
Soil
Poor, dry, well-drained or chalky soil.
Temperature
Hardy in temperate climates; tolerates cold winters.
How easy
Easy
Safety
Toxic: All parts contain pyrrolizidine alkaloids that build up in the liver if eaten, causing liver damage over time.
Native range
Europe to Xinjiang
Climate
temperate
About
Echium vulgare, known as viper's bugloss and blueweed, is a species of flowering plant in the borage family Boraginaceae. It is native to most of Europe and western and central Asia and it occurs as an introduced species in north-eastern North America, south-western South America and the South and North Island of New Zealand. If eaten, the plant is toxic to horses and cattle through the accumulation of pyrrolizidine alkaloids in the liver.
The plant root was used in ancient times as a treatment for snake or viper bites. According to the Doctrine of signatures, plants were thought to have traits (in this case a speckled stem reminiscent of snake skin, and flowers like an open viper's mouth) that mirror the ailment they treat.
How to grow it
E. vulgare is cultivated as an ornamental plant, and numerous cultivars have been developed. The cultivar 'Blue Bedder' has gained the Royal Horticultural Society's Award of Garden Merit.
Where it grows
It is native to Europe and temperate Asia. It has been introduced to Chile, New Zealand and North America, where it is naturalised in parts of the continent including Ontario and northern Michigan, being listed as an invasive species in Washington. It is found in dry, calcareous grassland and heaths, bare and waste places, along railways and roadsides and on coastal cliffs, sand dunes and shingle.
Text excerpted from the Wikipedia article Echium vulgare by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.