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Sequoia sempervirens

Common name: Coastal Redwood Family: Taxodiaceae
Author: (D.Don.)Endl. Botanical references: 11, 71, 200
Synonyms: Taxodium sempervirens (D.Don.)
Known Hazards: None known
Range: South-western N. America - Oregon to California.
Habitat: Deep well-drained soils on flat land and slopes in the coastal fog belt below 600 metres[71, 229].
Edibility Rating (1-5): 0Medicinal Rating (1-5):1

Other Possible Synonyms:From various places across the web, may not be correct. See below.
S. sempervirens f. pendula[G]
Other Common Names:From various places around the Web, may not be correct. See below.
Coast Redwood [H], Redwood [FEIS,S,B,DEN1,P],
Epithets:From a Dictionary of Botanical Epithets
sempervirens = evergreen; virens = green;
Systematics:From a USDA Plants Database
Order: Pinales. Redwood family

Physical Characteristics

An evergreen tree growing to 110m by 20m at a fast rate. It is hardy to zone 8 and is frost tender. It is in leaf all year, in flower from February to April, and the seeds ripen in October. The scented flowers are monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and are pollinated by Wind. We rate it 0/5 for edibility and 1/5 for medicinal use.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils. The plant prefers acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It requires moist soil. It cannot tolerate atmospheric pollution.

Habitats and Possible Locations

Woodland, Canopy.

Edible Uses

None known

Medicinal Uses

Disclaimer

Stimulant; Tonic.

A poultice of the heated leaves has been used in the treatment of earaches[257].
The gummy sap has been used as a stimulant and tonic in the treatment of rundown conditions[257].

Other Uses

Basketry; Dye; Insulation; Paper; Soil conditioner; Stuffing; Wood.

A brown dye is obtained from the bark[168]. The bark and the wood contain tannin, but in too low a concentration for economic utilization[223]. On a 10% moisture basis, the bark contains 4.4% tannin and the wood 2.5%[223].
The sprouts from the burls have been used in making baskets[257].
The plant develops a thick covering of a soft and fibrous bark (you can punch it hard without hurting your hand). This can be harvested without harm to the tree and used as an insulating or stuffing material[171]. A fine bark dust that is produced whilst doing this is a good soil conditioner[171]. This fibrous bark is also used for making paper. Branches can be harvested at any time of the year from logged trees, the bark is cut into useable pieces and soaked in clear water prior to cooking for 6 or more hours with lye. The fibres are beaten for six hours in a ball mill and the paper is a brown colour[189].
Wood - straight-grained, knot-free, light, soft, not strong, very durable in contact with the soil. A high quality and easily worked lumber, it is used for joinery, fence posts, construction etc[1, 11, 46, 61, 82, 171, 229].

Cultivation details

Requires a rich moist soil[1], growing best in deep sheltered valleys in cool humid areas[81, 200]. Dislikes chalky soils according to one report[1] whilst another says that it succeeds on chalk[200]. Tolerates poorly drained sites[200]. Tolerates partial shade for many years when young[200]. Strongly dislikes windy sites, especially if the winds are cold[200]. Plants dislike atmospheric pollution, growing poorly in cities[185].
Plants are fully hardy in Britain, though they may lose their leaves in cold winters. This seems to have no detrimental effect on the tree[188].
The giant redwood is probably the tallest growing tree in the world[11, 81], it thrives in Britain, especially in the cooler moister western half of the country[11]. It is fast growing in cultivation[81], reaching 25 metres tall in 20 years in a good site[200], and can be successfully coppiced even when quite old[11, 81, 200]. It is a long-lived tree in the wild, often living 1000 years and with some specimens 2200 years old recorded[229].
Plants are tender when young[11]. If trees larger than 80cm are planted out, they should be coppiced in order to allow the roots to become established[200].
Male cones shed their pollen in February unless delayed by frost when they might wait until April. Frost just before flowering or at the time of flowering kills the pollen[185].
New growth takes place from May until the end of September and can be very vigorous, 1.2 metres a year is not uncommon and this can be maintained for 30 years or more[185]. The best trees are found in Devon, Wiltshire, Perthshire and Ireland[185].
The crushed foliage has the scent of candle wax[185].

Propagation

Seed - sow early spring in a cold frame in light shade. Seed can also be sown as soon as it is ripe in a greenhouse. Germination rates are usually very low[11]. Prick out the seedlings into individual pots once they are large enough to handle and grow them on in a cold frame for their first winter, planting them out into their permanent positions in late spring or early summer. Plants will require some protection from the cold and spring frosts for their first year or two outdoors[78].
If there are sufficient seeds, they can be sown in a lightly shaded outdoor bed in late March[78]. Grow on the plants in the seedbed for two years before planting them out into their permanent positions in late autumn or early spring.
Cuttings of half-ripe wood, August/September in a frame. They form roots in winter or early spring[1]. Pot them up into individual pots once the roots are developing nicely and plant them out in the summer if they are growing well. Otherwise grow them on for the next winter in a cold frame and plant them out in early summer.

Scent

Leaves: Crushed
The crushed foliage has the scent of candle wax.

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 Taxodiaceae.

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]).

[11] Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray 1981
A classic with a wealth of information on the plants, but poor on pictures.

[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.

[61] Usher. G. A Dictionary of Plants Used by Man. Constable 1974 ISBN 0094579202
Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.

[71] Munz. A California Flora. University of California Press 1959
An excellent flora but no pictures. Not for the casual reader.

[78] Sheat. W. G. Propagation of Trees, Shrubs and Conifers. MacMillan and Co 1948
A bit dated but a good book on propagation techniques with specific details for a wide range of plants.

[81] Rushforth. K. Conifers. Christopher Helm 1987 ISBN 0-7470-2801-X
Deals with conifers that can be grown outdoors in Britain. Good notes on cultivation and a few bits about plant uses.

[82] Sargent. C. S. Manual of the Trees of N. America. Dover Publications Inc. New York. 1965 ISBN 0-486-20278-X
Two volumes, a comprehensive listing of N. American trees though a bit out of date now. Good details on habitats, some details on plant uses. Not really for the casual reader.

[168] Grae. I. Nature's Colors - Dyes from Plants. MacMillan Publishing Co. New York. 1974 ISBN 0-02-544950-8
A very good and readable book on dyeing.

[171] Hill. A. F. Economic Botany. The Maple Press 1952
Not very comprehensive, but it is quite readable and goes into some a bit of detail about the plants it does cover.

[185] Mitchell. A. F. Conifers in the British Isles. HMSO 1975 ISBN 0-11-710012-9
A bit out of date (first published in 1972), but an excellent guide to how well the various species of conifers grow in Britain giving locations of trees.

[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.

[189] Bell. L. A. Plant Fibres for Papermaking. Liliaceae Press 1988
A good practical section on how to make paper on a small scale plus details of about 75 species (quite a few of them tropical) that can be used.

[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.

[223] Rottsieper. E.H.W. Vegetable Tannins The Forestal Land, Timber and Railways Co. Ltd. 1946
A fairly detailed treatise on the major sources of vegetable tannins.

[229] Elias. T. The Complete Trees of N. America. Field Guide and Natural History. Van Nostrand Reinhold Co. 1980 ISBN 0442238622
A very good concise guide. Gives habitats, good descriptions, maps showing distribution and a few of the uses. It also includes the many shrubs that occasionally reach tree proportions.

[245] Genders. R. Scented Flora of the World. Robert Hale. London. 1994 ISBN 0-7090-5440-8
An excellent, comprehensive book on scented plants giving a few other plant uses and brief cultivation details. There are no illustrations.

[257] Moerman. D. Native American Ethnobotany Timber Press. Oregon. 1998 ISBN 0-88192-453-9
Very comprehensive but terse guide to the native uses of plants. Excellent bibliography, fully referenced to each plant, giving a pathway to further information. Not for the casual reader.


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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
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