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Eucalyptus crebra
Myrtaceae FAMILY

Eucalyptus crebra

Eucalyptus crebra

Edibility
0/5
Medicinal
0/5

Safety & Hazards

None known

Cultivation Details

HabitEvergreen Tree
GrowthMedium

Eucalyptus crebra is a plant of the subtropical to tropical zones of eastern Australia where it can be found at elevations from sea level to 1,400 metres[1]. It grows best in areas where annual daytime temperatures are within the range 26 - 36°c, but can tolerate 9 - 40°c[1]. New growth can be killed by temperatures of -1°c or lower, whilst temperatures of -5°c can kill even the dormant plant[1]. It prefers a mean annual rainfall in the range 600 - 2,000mm, but tolerates 500 - 2,400mm[1]. Requires a sunny position. Prefers a light to medium, well-drained soil, succeeding in soils of low fertility[1]. Found in the wild in a range of soils, but mainly acid sandy soils, sometimes overlying alkaline clayey subsoils[2]. Prefers a pH in the range 5.5 - 6.5, tolerating 5 - 7.5[1]. Established plants are drought tolerant[1]. Trees are somewhat slow-growing[2]. Annual wood production potential is 3 - 8 cubic metres per hectare[1]. Whilst most Eucalyptus species, grown in small numbers outside their native range, can be an attractive and useful addition to the landscape, certain species (including this one) are more problematic. When grown in monocultures, especially outside their native range, they can become an environmental disaster. They are voracious, especially in their use of water; they are allelopathic, inhibiting the growth of the native flora; they reduce habitats for native fauna; and encourage the worst possible attitudes to land use and conservation[3]. The tree has a thick, hard, corrugated bark[4]. This species is one of the ironbark group of Eucalypts. The resin exudes into the bark then hardens making the bark very haed and difficult to cut through with primitive tools[5]. Eucalyptus species have not adopted a deciduous habit and continue to grow until it is too cold for them to do so. This makes them more susceptible to damage from sudden cold snaps. If temperature fluctuations are more gradual, as in a woodland for example, the plants have the opportunity to stop growing and become dormant, thus making them more cold resistant. A deep mulch around the roots to prevent the soil from freezing also helps the trees to survive cold conditions[3]. Many members of this genus are remarkably adaptable however, and there can be a dramatic increase in the hardiness of subsequent generations from the seed of survivors growing in temperate zones[3].

Propagation

Seed - surface sow late winter/early spring in a sunny position in a greenhouse[6, 7, 8]. Species that come from high altitudes appreciate 6 - 8 weeks cold stratification at 2°c[3]. Pot up the seedlings into individual pots as soon as the second set of seed leaves has developed, if left longer than this they might not move well. Plant out into their permanent positions in early summer and give them some protection from the cold in their first winter. The seed can also be sown in early summer, the young trees being planted in their final positions in late spring of the following year. The seed has a long viability[3]. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Eucalyptus+crebra>

Pollinators

Bees, Insects

References

  1. [1]Ecocrop — http://ecocrop.fao.org/ecocrop/srv/en/home ↩︎Basic information on a wide range of useful plants, plus details of environmental needs where available.
  2. [2]Eucalypts for Planting — Jacobs M.R. · FAO; Rome · 1981 · http://www.fao.org · ISBN 92-5-100570-2 ↩︎An excellent publication, rather dated now but with a wealth of information about the Eucalypts. It can be downloaded from the Internet as a PDF file.
  3. [3]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.
  4. [4]Australian Timber handbook — Wallis N.K. · Angus & Robertson; Sydney · 1970 · ISBN 0-207-12053-6 ↩︎A comprehensive book about the uses of timber in Australia, it includes a section with information on the properties of the more commonly used woods in Australia
  5. [5]Australian Trees and Shrubs: Species for Land Rehabilitation and Farm Planting in the Tropics — Doran J.C.; Turnbull J.W. (Editors) · Australian Centre for International Agricultural Research; Canbe · 1997 · ISBN 1-86320-127-0 ↩︎A very informative book, rich in information about the uses, cultivation needs and very much more for over 160 species of Australian trees and shrubs.
  6. [6]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.
  7. [7]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.
  8. [8]Growing from Seed. Volume 2. — Rice. G. (Editor) · Thompson and Morgan. · 1988 · ISBN - ↩︎Very readable magazine with lots of information on propagation. An interesting article on Ensete ventricosum.
  9. [9]Flora of New South Wales — http://plantnet.rbgsyd.nsw.gov.au/floraonline.htm ↩︎An on-line resource giving a brief botanical description of all the native plants of New South Wales, their habitat and range, together with diagrams and photographs of the plants.
  10. [10]Eucalyptus Leaf Oils: Use, Chemistry, Distillation and Marketing — Southwell I.A. · 1992 · https://doi.org/10.1016/0031-9422(92)80403-2 ↩︎An extensive list of Eucalyptus species and their essential oil content.
  11. [11]The Useful Native Plants of Australia. — Maiden J.H. · Turner & Co.; London. · 1889 · http://www.biodiversitylibrary.org ↩︎Terse details of the uses of many Australian plants and other species naturalised, or at least growing, in Australia. It can be downloaded from the Internet.
  12. [12]Flora of South-eastern Queensland (3 volumes) — Stanley T.D. & Ross E.M. · Queensland Government; Queensland · 1983 · ISBN 0-7242-2127-1 ↩︎