PlantPeers
Back to Catalog
No image available
Rosaceae FAMILY

Sorbus torminalis

Sorbus torminalis

Edibility
3/5
Medicinal
0/5

Safety & Hazards

Although no specific information has been seen, the seed, and other parts of the plant, is likely to contain cyanogenic glycosides. When injested, these compounds break down in the digestive tract to release cyanide. Used in small quantities in both traditional and conventional medicine, this exceedingly poisonous compound has been shown to stimulate respiration, improve digestion, and promote a sense of well-being[1]. It is also claimed by some to be of benefit in the treatment of cancer - though this claim has been largely refuted. In larger concentrations, however, cyanide can cause gasping, weakness, excitement, pupil dilation, spasms, convulsions, coma and respiratory failure leading to death[2]. The levels of toxin can be detected by the level of bitterness:- sweet almonds, for example, contain only very low levels of it and are safe to eat in quantity, whilst bitter almonds (which are used as a flavouring in foods such as marzipan) contain much higher levels and should only be eaten in very small quantities. Great caution should be employed if the taste is moderately to very bitter[PFAF].

Cultivation Details

HabitDeciduous Tree
GrowthMedium

Sorbus torminalis is a moderately cold-hardy tree, tolerating temperatures down to around -20°c when dormant, whilst the new growth in spring is undamaged at -5°c[3]. It grows best in areas with hot summers[4], having an optimum mean annual temperature between 10 - 17°c. It tolerates a minimum annual rainfall of aroundt 500mm, while the optimum lies between 700 - 1,500mm[3]. Prefers an open, sunny position, though it tolerates moderate shade (but fruits less well)[5, 6]. Grows best on warm-dry limestone soils, also doing well on clay or loamy soils. It can succeed in most reasonably good soils so long as they are reasonably well-drained and not too poor or acid[7, 8, 5, 3]. Plants can tolerate a pH range from 3.5 - 8[3]. A moderately fast-growing tree, it commences fruiting when around 15 - 20 years old and usually lives for 100 - 200 years, though some trees 300 - 400 years old are known[3]. Plants are susceptible to fireblight[6]. Plants respond well to coppicing[9]. When found in a truly wild situation this species is considered to be an indication of primary woodland[10].

Propagation

Seed - best sown as soon as it is ripe in a cold frame[11, 12]. If you have sufficient seed it can be sown in an outdoor seedbed[11, 12]. Stored seed germinates better if given 2 weeks warm then 14 - 16 weeks cold stratification[13], so sow it as early in the year as possible. Prick out the seedlings into individual pots when they are large enough to handle. Seedlings are very slow to put on top-growth for their first year or two[5], but they are busy building up a good root system. It is best to keep them in pots in a cold frame for their first winter and then plant them out into their permanent positions in late spring. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Sorbus+torminalis>

Pollinators

Insects

References

  1. [1]Encyclopaedia of Herbs and their Uses. — Bown. D. · Dorling Kindersley, London. · 1995 · ISBN 0-7513-020-31 ↩︎A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.
  2. [2]Poisonous Plants of North Carolina — http://www.ces.ncsu.edu/depts/hort/consumer/poison/poison.htm ↩︎An excellent concise but comprehensive guide to toxic plants that grow in N. Carolina. It lists even those plants that are of very low toxicity, including several well-known food plants such as carrots and potatoes.
  3. [3]European Atlas of Forest Tree Species — San-Miguel-Ayanz, J., de Rigo, D., Caudullo, G., Houston Dur · European Commission · 2016 · http://10.2788/038466 · ISBN 978-92-79-52833-0 ↩︎An excellent guide to the forest trees of Europe. It can be downloaded from the Internet
  4. [4]The Plantsman. Vol. 3. 1981 - 1982. — ? · Royal Horticultural Society · 1981 · ISBN - ↩︎Excerpts from the periodical giving cultivation details and other notes on some of the useful plants..
  5. [5]Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. — Bean. W. · Murray · 1981 · ISBN - ↩︎A classic with a wealth of information on the plants, but poor on pictures.
  6. [6]The RHS Gardener's Encyclopedia of Plants and Flowers — Brickell. C. · Dorling Kindersley Publishers Ltd. · 1990 · ISBN 0-86318-386-7 ↩︎Excellent range of photographs, some cultivation details but very little information on plant uses.
  7. [7]RHS Dictionary of Plants plus Supplement. 1956 — F. Chittendon. · Oxford University Press · 1951 · ISBN - ↩︎Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [ 200 ]).
  8. [8]Growing Unusual Fruit. — Simmons. A. E. · David & Charles; Newton Abbot. · 1972 · ISBN 0-7153-5531-7 ↩︎A very readable book with information on about 100 species that can be grown in Britain (some in greenhouses) and details on how to grow and use them.
  9. [9]Planting Native Trees and Shrubs. — Beckett. G. and K. · Jarrold · 1979 · ISBN - ↩︎An excellent guide to native British trees and shrubs with lots of details about the plants.
  10. [10]The New RHS Dictionary of Gardening. 1992. — Huxley. A. · MacMillan Press · 1992 · ISBN 0-333-47494-5 ↩︎Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
  11. [11]Propagation of Trees, Shrubs and Conifers. — Sheat. W. G. · MacMillan and Co · 1948 · ISBN - ↩︎A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
  12. [12]Hardy Woody Plants from Seed. — McMillan-Browse. P. · Grower Books · 1985 · ISBN 0-901361-21-6 ↩︎Does not deal with many species but it is very comprehensive on those that it does cover. Not for casual reading.
  13. [13]Seed Manual for Ornamental Trees and Shrubs. — Gordon. A. G. and Rowe. D. C. F. · HMSO; London · 1982 · ISBN 0-11-710152-4 ↩︎Very comprehensive guide to growing trees and shrubs from seed. Not for the casual reader.
  14. [14]Flora of the USSR. — Komarov. V. L. · Israel Program for Scientific Translation · 1968 · http://www.biodiversitylibrary.org · ISBN - ↩︎An immense (25 or more large volumes) and not yet completed translation of the Russian flora. Full of information on plant uses and habitats but heavy going for casual readers. It can be downloaded from the Internet.
  15. [15]Flora of N. America — http://flora.huh.harvard.edu/fna/ ↩︎An on-line version of the flora with an excellent description of the plant including a brief mention of plant uses.
  16. [16]Flora of the British Isles. — Clapham, Tutin and Warburg. · Cambridge University Press · 1962 · ISBN - ↩︎A very comprehensive flora, the standard reference book but it has no pictures.
  17. [17]Sturtevant's Edible Plants of the World. — Hedrick. U. P. · Dover Publications · 1972 · ISBN 0-486-20459-6 ↩︎Lots of entries, quite a lot of information in most entries and references.
  18. [18]Food for Free. — Mabey. R. · Collins · 1974 · ISBN 0-00-219060-5 ↩︎Edible wild plants found in Britain. Fairly comprehensive, very few pictures and rather optimistic on the desirability of some of the plants.
  19. [19]The Useful Plants of Great Britain. — Johnson. C. P. ↩︎Written about a hundred years ago, but still a very good guide to the useful plants of Britain.
  20. [20]Cornucopia - A Source Book of Edible Plants. — Facciola. S. · Kampong Publications · 1990 · ISBN 0-9628087-0-9 ↩︎Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
  21. [PFAF]Plants for a Future — pfaf.org ↩︎