Comfrey collection
Comfrey collection
Symphytum azureum, grandiflorum
Plants in good condition upon arrival. Planted in rather poor, clayey soil with exposure to shade or partial shade. The three comfrey plants are now 1 year old. They have all survived, only one is in flower. Symphytum azureum => slight growth, beautiful foliage, no flowering Symphytum grandiflorum => slight growth, adequate foliage, no flowering Symphytum Hidcote Blue => it has grown vigorously and is in full bloom.
FMR, 17/04/2026
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Description
This Consoude Collection brings together the Symphytum azureum or Blue Comfrey and two varieties of comfrey with large flowers: the Symphytum grandiflorum 'Hidcote Blue' and the S. grandiflorum. Ideal for gardeners looking for versatile plants, these perennials are also known for their medicinal properties and their use in organic gardening. Comfreys are very cold-resistant, low-maintenance, easy to grow plants in any not too dry garden soil and in all exposures. Enjoy their flowering from April to July, depending on the variety and climate.
The collection consists of:
1 x Symphytum azureum: this botanical species is distinguished by its azure blue flowers and its early and prolonged flowering, from April to July. Its foliage is deciduous. It will be ideal for dressing up areas of woodland, shade, or wetlands.
1 x Symphytum grandiflorum 'Hidcote Blue': offering bi-coloured sky blue and white flowers and deciduous foliage, this variety thrives in partial shade. It blooms in June-July.
1 x Symphytum grandiflorum: with cream white to pale yellow flowers, this wild species adapts well to various types of soil, it is particularly versatile. It blooms in June-July.
These comfreys can be planted in spring or autumn, they are used in borders or as ground cover, especially at the edge of woodland or in wetlands, on riverbanks... These perennials have a running stump that allows them to colonise the soil. Their above-ground vegetation is deciduous, it emerges from the ground every spring and disappears in winter. Plan for 4 to 5 plants per m² to cover the ground within 3 years. Maintain a distance of 40 to 60 cm between each plant.
Comfreys can be combined with other robust perennial plants that they are not likely to supplant. Male Fern, Greater Periwinkle, and Solomon's Seal will be good companions. The Symphytum is a melliferous plant, which also improves soil structure. It can be used to make a liquid fertiliser called comfrey tea, by maceration in cold water: it is a spring stimulant. Tolerating occasional trampling quite well, it makes an excellent ground cover that allows few 'weeds' to grow through. Finally, it is a very welcoming plant for biodiversity: it is appreciated by bees, lacewings, and spiders.
Flowering
Foliage
Plant habit
Botanical data
Symphytum
azureum, grandiflorum
Boraginaceae
Cultivar or hybrid
Planting and care
Plant the Symphytum in preferably moist and rich soil, with a humus-bearing tendency. However, it is a very accommodating plant that will also grow in less welcoming, including limestone or clay soil, as long as they have a certain depth and do not dry out too much in summer. Plant in full sun or partial shade, or even in the shade of large trees in warm regions. Avoid excessive sunlight. The Symphytum does not have any problems requiring any treatment. To limit its spread, remove the shallowly rooted shoots at the periphery of the clumps or simply cut them with a spade.
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).
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 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.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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