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Symphytum tuberosum - L.
                 
Common Name Tuberous comfrey
Family Boraginaceae
USDA hardiness 4-8
Known Hazards No reports of toxicity have been seen for this species, but the following reports have been seen for S. officinale. This plant contains small quantities of a toxic alkaloid which can have a cumulative effect upon the liver. Largest concentrations are found in the roots, leaves contain higher quantities of the alkaloid as they grow older and young leaves contain almost none. Most people would have to consume very large quantities of the plant in order to do any harm, though anyone with liver problems should obviously be more cautious. In general, the health-promoting properties of the plant probably far outweigh any possible disbenefits, especially if only the younger leaves are used.
Habitats Woods, scrub and by rivers[187].
Range Europe, including Britain, south and east from Germany to Spain, S.w.Russia and Turkey.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Moist Soil Semi-shade Full sun

Summary

Symphytum tuberosum Tuberous comfrey


http://www.kurtstueber.de/
Symphytum tuberosum Tuberous comfrey
http://www.kurtstueber.de/
   
Physical Characteristics
 icon of manicon of flower
Symphytum tuberosum is a PERENNIAL growing to 0.6 m (2ft) by 0.6 m (2ft in) at a fast rate.
It is hardy to zone (UK) 5. It is in flower from May to June, and the seeds ripen from Jun to July. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees.Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and can grow in heavy clay soil. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

Synonyms

Habitats
Woodland Garden Sunny Edge; Dappled Shade; Shady Edge; Ground Cover;
Edible Uses
Edible Parts:
Edible Uses: Coffee.

When roasted until brown and brittle, and then finely ground, the root is used as a coffee substitute. It has a smoothness that is not found in real coffee[183].
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
Other Uses
A good, and sometimes rampant, ground cover plant for a shady border or woodland.
Cultivation details
Tolerates most soils and situations but prefers a moist soil and some shade. Grows well in heavy clay soils. Hardy to about -20°c[187]. Plants form extensive patches, spreading by means of a creeping tuberous rhizome[187]. Plants are dormant in summer[187].
Propagation
Seed - sow spring or autumn in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. If you have sufficient seed you can try an outdoor sowing in situ in the spring. Division succeeds at almost any time of the year. Simply use a spade to chop off the top 7cm of root just below the soil level. The original root will regrow and you will have a number of root tops, each of which will make a new plant. These can either be potted up or planted out straight into their permanent positions.

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Other Names
Found In
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 it’s worth checking.

Conservation Status
IUCN Red List of Threatened Plants Status :
Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Symphytum asperumPrickly Comfrey32
Symphytum grandiflorumGround Cover Comfrey, Comfrey00
Symphytum officinaleComfrey, Common comfrey35
Symphytum uplandicumComfrey35
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Botanical References
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Subject : Symphytum tuberosum  

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