Practical
Plants

Pyracantha 'Wateri'

a perennial woody evergreen member of the Pyracantha genus in the family Rosaceae.

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Taxonomy and growth

Family
Rosaceae
Life cycle
perennial
Foliage
evergreen
Woodiness
woody
Height
2.5 m
Spread
2.5 m
Fertility
Bees
Flower type
hermaphrodite
Pollinators
Bees

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.

Although no specific mention has been seen for this species, it belongs to a genus where most, if not all members of the genus produce hydrogen cyanide, a poison that gives almonds their characteristic flavour. This toxin is found mainly in the leaves and seed and is readily detected by its bitter taste. It is usually present in too small a quantity to do any harm but any very bitter seed or fruit should not be eaten. 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.

Material uses

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

Tolerant of trimming and of reasonable exposure, it can be grown as a medium to tall hedge[2][7].

Environment

Range
A hybrid of garden origin, probably P. atalantioides x P. rogersiana.
Habitat
Not known in the wild.
Light
full sun
Shade tolerance
permanent shade
Water
moderate
Soil textures
sandy, loamy, clay, heavy 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[5]. Remove all the fruit flesh since this can inhibit germination[5]. Stored seed requires 3 months cold stratification, sow it as early in the year as possible in a cold frame[3]. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the cold frame for their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. This species is a hybrid and will not breed true from seed. Cuttings of almost mature wood, 5 - 10cm with a heel, mid-August in a cold frame[8]. Pot up in October or the following spring[8].

Cultivation

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

Prefers a good well-drained, moisture retentive loamy soil[1][5]. Succeeds in any soil that is warm and not very heavy[2]. Another report says that it grows well in heavy clay soils. Succeeds in sun or part shade, though it does not fruit so well in a shady position[5]. Plants are tolerant of quite deep shade[6]. Tolerates atmospheric pollution and reasonable exposure[5]. Plants are susceptible to scab and fireblight[2], especially when they are grown on acid sandy soils[4].

References

  1. F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951-00-00

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

    ↩1↩2↩3

  3. Dirr. M. A. and Heuser. M. W. The Reference Manual of Woody Plant Propagation. Athens Ga. Varsity Press 1987-00-00 ISBN 0942375009

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  4. Thomas. G. S. Ornamental Shrubs, Climbers and Bamboos. Murray 1992-00-00 ISBN 0-7195-5043-2

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

    ↩1↩2↩3↩4↩5

  6. Grey-Wilson. C. & Matthews. V. Gardening on Walls Collins 1983-00-00 ISBN 0-00-219220-0

    ↩

  7. Shepherd. F.W. Hedges and Screens. Royal Horticultural Society. 1974-00-00 ISBN 0900629649

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

    ↩1↩2

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