Symphytum azureum
Symphytum azureum
Symphytum azureum
Symphytum azureum
Symphytum azureum
Symphytum azureum
Symphytum azureum
Symphytum azureum
Blue Comfrey
Plant in very bad condition, almost dead, out of the pot. No sign of life from the small remaining root piece.
Romain , 26/05/2024
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This plant carries a 12 months recovery warranty
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Description
The Symphytum azureum, or blue comfrey, is a vigorous perennial and a must-have among medicinal plants. This variety stands out with its sky-blue to dark-blue flowers during spring. It will be ideal for dressing up your undergrowth, shaded areas, or damp soils.
Originally from the Caucasus, the blue comfrey has a creeping habit and a brittle stump. The plant quickly reaches 30 cm (12in) in height and 60 cm (24in) in width and is entirely covered with iridescent and prickly hairs at the base of the stems. Its abundant and honey-rich spring flowering displays multiple purple bells that evolve into sky blue to dark blue. At the end of flowering, the upright stems have a trailing appearance. Its semi-evergreen leaves are green and leathery, with oblong and lanceolate shapes and prominent veins. In shaded exposure, the leaves reach 20 to 25 cm (8 to 10in) in length. Its veined and green stems are intensely purple at the base.
Fast-growing Symphytum azureum is highly hardy. It spreads through robust stems called rootstocks and easily self-seeds.
In the garden, blue comfrey is a low-maintenance plant. It thrives in humus-bearing soils in partial to full shade but also does well in full sun if the soil is moist and humid. All cool areas of your garden will suit it. It is ideal for bordering flowerbeds, undergrowth, and riversides. With its rapid growth, you can pair it with bushes like rhododendrons or hydrangea and perennials like wild garlic or bellflower.
The blue comfrey gets its vernacular name from its ability to heal fractures and wounds. It is used in various fields, such as organic agriculture, as a "green" fertiliser, or as a strengthening plant for animals. It is also used in medicine due to its high content of vitamin B12.
Symphytum azureum in pictures
Flowering
Foliage
Plant habit
Botanical data
Symphytum
azureum
Boraginaceae
Blue Comfrey
Caucasus
Planting and care
Plant the Symphytum azureum in fresh, rich, humus-bearing, and well-drained soil. Place it in full sun or partial shade. Keep it protected from excessive sunlight. The Symphytum does not have any issues requiring any treatment.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.