Practical
Plants

Sorbus species

a perennial woody deciduous member of the Sorbus genus in the family Rosaceae.

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Taxonomy and growth

Family
Rosaceae
Genus
Sorbus
Life cycle
perennial
Foliage
deciduous
Woodiness
woody
Height
10 m
Spread
7 m
Fertility
Self fertile, Insects
Flower type
hermaphrodite
Pollinators
Insects

Uses

Toxicity

Toxicity warning. The historical record reports a hazard for this plant. Do not use it to decide which parts are safe to eat or use medicinally.

This section contains historical Plants For A Future notes marked noncommercial.

The seeds probably contain hydrogen cyanide. This is the ingredient that gives almonds their characteristic flavour. Unless the seed is very bitter it should be perfectly safe in reasonable quantities. In small quantities, hydrogen cyanide has been shown to stimulate respiration and improve digestion, it is also claimed to be of benefit in the treatment of cancer. In excess, however, it can cause respiratory failure and even death.

Edible uses

Fruit - raw or cooked[K]. Up to 15mm in diameter[7]. There are no edible uses listed for Sorbus species.

Ecology and functions

Ecosystem niche
Canopy, Secondary canopy

Environment

Range
A range of hybrids of garden origin
Habitat
Not known in the wild
Light
full sun
Shade tolerance
light shade
Water
moderate
Hardiness
Zone 7+
Soil textures
sandy, loamy, clay
Soil pH
acid, neutral, alkaline
Drainage
well drained
Tolerances
high wind
Wind
Yes
Tolerates Nutritionally Poor Soil
No
Drought
intolerant

Propagation

This section contains historical Plants For A Future notes marked noncommercial.

Seed - best sown as soon as it is ripe in a cold frame[4][5]. If you have sufficient seed it can be sown in an outdoor seedbed[4][5]. Stored seed germinates better if given 2 weeks warm then 14 - 16 weeks cold stratification[6], 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[1], 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. This is a hybrid and so is unlikely to breed true from seed.

Cultivation

This section contains historical Plants For A Future notes marked noncommercial.

This record is to cover a series of hybrids of garden origin that belong to the whitebeam section of the genus but have not been placed in a distinct species. The following notes are based on the general needs of this group of plants[K]. Succeeds in most reasonably good soils in an open sunny position[1]. Tolerates light shade[2], though it fruits better in a sunny position[K]. Plants are susceptible to fireblight[2]. A very ornamental tree[11. Plants are apt to die back without any warning[1].

References

  1. Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray 1981-00-00

    ↩1↩2↩3

  2. Brickell. C. The RHS Gardener's Encyclopedia of Plants and Flowers Dorling Kindersley Publishers Ltd. 1990-00-00 ISBN 0-86318-386-7

    ↩1↩2

  3. Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992-00-00 ISBN 0-333-47494-5

  4. Sheat. W. G. Propagation of Trees, Shrubs and Conifers. MacMillan and Co 1948-00-00

    ↩1↩2

  5. McMillan-Browse. P. Hardy Woody Plants from Seed. Grower Books 1985-00-00 ISBN 0-901361-21-6

    ↩1↩2

  6. Gordon. A. G. and Rowe. D. C. f. Seed Manual for Ornamental Trees and Shrubs.

    ↩

  7. Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray (1981-00-00)

    ↩

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