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Thuja occidentalis
American arbor-vitae
Evergreen tree
(1 Page of 5)

 
The Thuja occidentalis plant species is found in Eastern N. America - Nova Scotia to Georgia, west to Illinois and Minnesota. It is a member of the Cupressaceae family. Common gardeners may know the plant as American arbor-vitae.

Cultivation | Propagation | General Uses
Medicinal | Edible Uses
 
Latin Name:  Thuja occidentalis
Common Name:  American arbor-vitae
Family:  Cupressaceae
Author:  L.
 
Known Hazards:  An essential oil from the leaves is poisonous if taken in large doses[7, 65]. This plant should not be used by pregnant women[165].
 
Mature Height:  15   Mature Width:  5
 
Habitat:  Swamps and cool rocky banks of streams[43], forming dense almost impenetrable forests[82, 165]. Also found on rocky soils[226]. Plants are usually found on neutral to alkaline limestone soils[226].



Cultivation Notes:  Prefers a permanently moist soil[1], it is intolerant of dry soils[11]. A useful plant for very poorly-drained soils[185, 200]. The best stands in America are on well-drained soils[11]. Grows well in heavy clay soils. Succeeds in sandy soils[188] and on chalk[200]. A very hardy tree, tolerating very cold winters with temperatures down to -46°c[200, 238]. In cold weather the leaves turn brown, becoming green again in the spring[226]. It is usually slow growing and short-lived in cultivation in Britain and rarely looks thrifty[81, 185]. However, there are some good specimens in western Britain[4, 14]. Some cultivars are more healthy, 'Lutea' is growing very well in several places and 'Spiralis' is also growing well[185]. Trees live 200 - 300 years in the wild[226]. Sometimes planted as a timber tree in C. Europe[50]. Plants cannot regenerate from old wood. Pruning is not normally necessary for this species, any pruning that is carried out should be done with care[238]. The wood and the foliage are strongly aromatic[226]. The crushed leaves have a scent of apples[185].

For further Thuja occidentalis gardening information
click on one of the blue links below

 
Cultivation | Propagation | General Uses
Medicinal | Edible Uses
 

The information above has been supplied solely via the hard work and dedication of the team at 'Plants for a Future'.
View their bibliography
Useful Edible Plants Future

 


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