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Rutaceae FAMILY

Citrus × junos

Citrus × junos

Edibility
3/5
Medicinal
1/5

Safety & Hazards

None known

Cultivation Details

HabitEvergreen Tree
Growth—

Three main climates are suitable for commercial citrus production - tropical climates, subtropical with winter rain such as in the Mediterranean and semitropical with summer rainfall as found in Florida and southern Brazil[1]. The optimal temperatures for citrus cultivation range between 25 - 30°c, with the coldest month having an average minimum of at least 15°c[1]. Growth generally ceases below 13°c and above 38°c[1]. If there are dry periods of more than three months, then irrigation will be necessary[1]. This species is one of the hardiest in the genus, aid to be able to withstand temperatures down to -12°c[2]. Prefers a deep, well-drained but moisture-retentive loamy soil in full sun[1]. Prefers a pH in the range 5 - 6[1]. Plants cannot withstand long dry periods[2]. This species is possibly a hybrid involving C. Cavaleriei and C. Reticulata[3].

Propagation

Seed-grown plants are normally quite similar to their parent, but there is always a chance of hybridisation with atypical seedlings being produced[2]. The seed is best sown in containers as soon as it is ripe, after thoroughly rinsing it[4, 1]. Sow stored seed in containers as soon as possible]. Germination usually takes place within 2 - 3 weeks at 13°c. Seedlings are liable to damp off so they must be watered with care and kept well ventilated. The seed is usually polyembrionic, two or more seedlings arise from each seed and they are genetically identical to the parent but they do not usually carry any virus that might be present in the parent plant[1]. When large enough to handle, prick the seedlings out into individual pots and grow them on until they are 10cm or more tall before planting out into their permanent positions. Cuttings of half-ripe wood, July/August in a frame. This species grows easily from cuttings[1]. Layering in October. Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2026-02-20. <tropical.theferns.info/viewtropical.php?id=Citrus+%C3%97+junos>

Pollinators

Data unavailable

References

  1. [1]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.
  2. [2]Trade Winds Fruit — http://www.tradewindsfruit.com/index.htm ↩︎The on-line catalogue of a company selling seeds. Gives descriptions, photos and uses of a very wide range of fruit and other food-producing plants plus ornamentals.
  3. [3]Flora of China — Missouri Botanical Garden Press; St. Louis. · 1994 · http://flora.huh.harvard.edu/china/ ↩︎An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
  4. [4]Growing from Seed. Volume 4. — Bird. R. (Editor) · Thompson and Morgan. · 1990 · ISBN - ↩︎Very readable magazine with lots of information on propagation. A good article on Yuccas, one on Sagebrush (Artemesia spp) and another on Chaerophyllum bulbosum.
  5. [5]Mansfeld's Database of Agricultural and Horticultural Plants — http://mansfeld.ipk-gatersleben.de/pls/htmldb_pgrc/f?p=185:3:4292127278597336 ↩︎Terse details of a huge range of useful plants.
  6. [6]Cornucopia II — Facciola. S. · Kampong Publications, California. · 1998 · ISBN 0-9628087-2-5 ↩︎The second edition of an excellent guide to the edible uses of plants, though it does not give any details of cultivation etc.
  7. [7]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.