Acacia podalyriifolia - Queensland Silver Wattle

Famille: Leguminosae, Genre: Acacia
Arbre à feuilles persistantes (3m de haut par 3m de large).

Habitat

Exposition
Plein soleil
Humidité
Sol sec à moyen.
Sol
Sol léger à moyen. Nécessite un sol drainant.
pH
Non calcaire
Rusticité
Zone 8
Habitat originel
Inconnu
Origine géographique
Australia - New South Wales, Queensland.

Comestibilité

  • Flowers - cooked [144].
  • Rich in pollen, they are often used in fritters [183].
  • The flowers have a delicate sweet perfume [245].

Autres usages

  • A yellow dye is obtained from the flowers [168].
  • A green dye is obtained from the seed pods [168].
  • When planted on steep slopes or other fragile soil systems, the extensive root system of this plant binds the soil together and helps to prevent erosion [200].

Culture

  • Prefers a sandy loam and a very sunny position [1].
  • Succeeds in any good garden soil that is not excessively limey [11, 167].
  • Many members of this genus become chlorotic on limey soils [200].
  • Can succeed in a hot dry position in a mixed border [166].
  • Plants are not very cold-hardy, tolerating temperatures down to about -3°c [260].
  • They succeed outdoors in the mildest areas of Britain, though even there they can be cut back to the ground in severe winters [1, 11].
  • A very ornamental tree[1], it can be pruned back hard after flowering in order to induce good flowering the following year [260].
  • Ces plantes ont une relation symbiotique avec des bactéries du sol qui forment des nodules sur les racines et fixent l'azote atmosphérique .
  • Une partie de cet azote est utilisé par la plante mais une partie est disponible aux autres plantes poussant à proximité [200].

Propagation

  • Seed - best sown as soon as it is ripe in a sunny position in a warm greenhouse [1].
  • Stored seed should be scarified, pre-soaked for 12 hours in warm water and then sown in a warm greenhouse in March .
  • The seed germinates in 3 - 4 weeks at 25°c [133].
  • As soon as the seedlings are large enough to handle, prick them out into individual pots and grow them on in a sunny position in the greenhouse for their first winter .
  • Plant them out in late spring or early summer, after the last expected frosts, and consider giving them some protection from the cold for their first winter outdoors .
  • Cuttings of half-ripe wood with a heel, July/August in individual pots in a frame [78].
  • Overwinter in a greenhouse for the first winter and plant out in their permanent positions in late spring or early summer .
  • Fair percentage [78].

Calendrier

En fleur
1 - 5
En feuille
1 - 12

Pollinisation

Type de fleur
Hermaphrodite (les fleurs ont des organes mâles et femelles)
Auto-fertile
Oui

Divers

Pollution
Non
Autres réferences
[11, 200]

Réferences

[1] F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 1951.
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaces in 1992 by a new dictionary (see [200]).
[11] Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. 1981.
A classic with a wealth of information on the plants, but poor on pictures.
[78] Sheat. W. G. Propagation of Trees, Shrubs and Conifers. 1948.
A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
[133] Rice. G. (Editor) Growing from Seed. Volume 1. 1987.
Very readable magazine with lots of information on propagation.
[144] Cribb. A. B. and J. W. Wild Food in Australia. 1976.
A very good pocket guide.
[166] Taylor. J. The Milder Garden. 1990.
A good book on plants that you didn't know could be grown outdoors in Britain.
[167] Holliday. I. and Hill. R. A Field Guide to Australian Trees. 1974.
A well illustrated and very readable book, but it does not contain much information for the plant project.
[168] Grae. I. Nature's Colors - Dyes from Plants. 1974.
A very good and readable book on dyeing.
[183] Facciola. S. Cornucopia - A Source Book of Edible Plants. 1990.
Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. 1992.
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
[245] Genders. R. Scented Flora of the World. 1994.
An excellent, comprehensive book on scented plants giving a few other plant uses and brief cultivation details. There are no illustrations.
[260] Phillips. R. & Rix. M. Conservatory and Indoor Plants Volumes 1 & 2 1998.
Excellent photos of over 1,100 species and cultivars with habits and cultivation details plus a few plant uses. Many species are too tender for outdoors in Britain though there are many that can be grown outside.

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