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Protea cynaroides

Common name: King Protea Family: Proteaceae
Author: L. Botanical references:  
Synonyms:  
Known Hazards: None known
Range: S. Africa - Cape Province.
Habitat: Moist areas in poor sandy soils at elevations of 100 - 1,000 metres[260]. Plants have also been found growing in rock crevices at elevations up to 1,500 metres[260].
Edibility Rating (1-5): 1Medicinal Rating (1-5):0

Systematics:From a USDA Plants Database
Order: Proteales. Protea family

Physical Characteristics

An evergreen shrub growing to 2m by 2m . It is hardy to zone 9 and is frost tender. It is in leaf all year, in flower from June to August. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects. We rate it 1/5 for edibility and 0/5 for medicinal use.

The plant prefers light (sandy) soils, requires well-drained soil and can grow in nutritionally poor soil. The plant prefers acid soils and can grow in very acid soil. It cannot grow in the shade. It requires dry or moist soil.

Habitats and Possible Locations

By Walls, By South Wall, By West Wall.

Edible Uses

Nectar.

The sweet nectar from the flowers is consumed directly[183].

Medicinal Uses

Disclaimer

None known

Other Uses

None known

Cultivation details

Requires a very well-drained light soil[1, 124], preferably on the poor side[200], with plenty of humus and sand[1]. Requires a pH of 6.5 or lower[200]. Plants are very difficult to grow[188], they are sensitive to nitrates and phosphates in the soil, these can prove toxic even at moderate levels[200]. Plants require reasonable potassium levels[260] and may also suffer from magnesium deficiency[200]. Requires a position with good air circulation[1, 124], but sheltered from cold winds[200]. Dislikes warm sultry or windless days[1, 124]. Requires full exposure to the sun[200].
Plants are not very hardy in Britain, but they can be grown outdoors in selected areas. They tolerate slight short-lived frosts once they are established. Plants at Tresco on the Scilly Islands tolerated temperatures down to -9°c over a period of 10 days[200]. Plants generally tolerate temperatures down to about -6°c, although prolonged frosts, or frosts combined with cold dry winds will cause damage[124]. They are best grown in a cool greenhouse, but plants can be placed outdoors in the summer[1].
A very ornamental plant[1]. A good bee plant, providing an abundance of nectar[46].
Plants are intolerant of root disturbance and should be grown in pots until they are planted into their final positions[1].

Propagation

Seed - best sown as soon as it is ripe in the autumn in individual pots in a greenhouse. See notes above on soil requirements. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Consider giving them some protection from the cold for at least their first winter outdoors.
Cuttings of half-ripe wood. July/August in a frame[200].

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

Web References

References for the family Proteaceae.

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[1] F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaces in 1992 by a new dictionary (see [200]).

[46] Uphof. J. C. Th. Dictionary of Economic Plants. Weinheim 1959
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.

[124] RHS. The Garden. Volume 113. Royal Horticultural Society 1988
Snippets of information from the magazine of the RHS, including details on Podophyllum, Canna and Protea species.

[183] Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications 1990 ISBN 0-9628087-0-9
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.

[188] Brickell. C. The RHS Gardener's Encyclopedia of Plants and Flowers Dorling Kindersley Publishers Ltd. 1990 ISBN 0-86318-386-7
Excellent range of photographs, some cultivation details but very little information on plant uses.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. 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.

[260] Phillips. R. & Rix. M. Conservatory and Indoor Plants Volumes 1 & 2 Pan Books, London. 1998 ISBN 0-330-37376-5
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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Bibliography

Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
WEB search engine by Rich Morris - Home Page- Contact Info
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