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botanical name:
Symphytum x uplandicum
Symphytum x uplandicum © Deeproot Plant Base
common name:  Russian Comfrey
synonyms:  Symphytum x uplandica, Symphytum peregrinum
family:  Boraginaceae
characteristics: perennial, ground-cover
height: 1.00m
width: 0.60m
growth rate: fast
growth habit:
leaf colour: grey-green
flower colour: mauve
stem/bark: green
main season: Spring
medicinal symbol medicinal
aspect: full sun, part shade, shade
conditions: moist soil, clay soil, sandy soil
preferred soil pH: any
minimum temp: -29°C
USDA zone: 5 to 9
Upright stems bear large felty greyish green leaves. Mauve-purple or blue flowers in late spring and early summer, opening from reddish buds.

Grows best in moist, reasonably fertile soil in partial shade or full sun if not too dry. Adaptable to most soils and a range of conditions.
Can become invasive, though this hybrid does not set viable seed.

By root cuttings or division, usually very easy.

Woodland and shady wildflower gardens. Herb gardens.

The leaves are rich in potassium and can be used as an organic fertiliser.
Has various medicinal uses.

other notes:
Naturally-occurring hybrid of Symphytum officinale x Symphytum asperum.
Naturalised wildflower of wasteground, where escaped from cultivation .
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