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Pittosporaceae FAMILY

Pittosporum rhombifolium

Pittosporum rhombifolium

Edibility
0/5
Medicinal
1/5

Safety & Hazards

None known

Cultivation Details

HabitEvergreen Tree
Growth—

Pittosporum rhombifolium is native to the subtropical and tropical climates of eastern Australia. It is not very cold-tolerant, but can be grown outdoors in the mildest parts of the temperate zone[1]. Pittosporum species generally grow best in a sunny position, but tolerate light shade. They succeed in most well-drained soils[2, 3]. Although flowers usually appear to be hermaphrodite, many species of Pittosporum are functionally dioecious, with individual specimens bearing mainly or totally flowers of one sex only. Even so, occasional functionally hermaphrodite flowers will appear and, in at least some species, these flowers can be self-compatible and produce fertile seed even in the absence of any other plants of that species[4]. The species in this genus are also very likely to hybridize with other members of the genus[3]. When growing a species from seed it is important to ensure that the seed either comes from a known wild source, or from isolated specimens in cultivation.

Propagation

Seed - sow when ripe in the autumn or in late winter in a warm greenhouse[5, 3]. The seed usually germinates freely. Prick out the seedlings into individual pots when they are large enough to handle, move the plants to a cold frame as soon as they are established and plant out late in the following spring[5]. Consider giving them some protection from the cold during their first winter outdoors. Cuttings of half-ripe wood, 5 - 7cm with a heel, mid summer in a frame[5]. Basal ripewood cuttings late autumn in a cold frame[3]. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Pittosporum+rhombifolium>

Pollinators

Insects

References

  1. [1]New Trees — Grimshaw J.; Bayton R.; Wilks H. · Kew Publishing; London · 2009 · ISBN 1842461737 ↩︎Provides comprehensive botanical descriptions and horticultural commentary on over 800 tree species that have been introduced to cultivation in recent decades.
  2. [2]Ornamental Shrubs, Climbers and Bamboos. — Thomas. G. S. · Murray · 1992 · ISBN 0-7195-5043-2 ↩︎Contains a wide range of plants with a brief description, mainly of their ornamental value but also usually of cultivation details and varieties.
  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]Revision of Pittosporum (Pittosporaceae) in Australia — Cayzer L.W.; Crisp M.D. & Telford I.R.H. · 2000 ↩︎A comprehensive review of the genus in Australia
  5. [5]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.
  6. [6]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.
  7. [7]The Australian and New Zealand Species of Pittosporum — Cooper R.C. · 1956 ↩︎Rather dated, but still an excellent treatment.
  8. [8]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.