THUYA GIGANTEA 425 



sun inducing transplantation in the early spring. It possesses, 

 however, an extraordinary recuperative power ; and often 

 survives the bad effects of the most inimical influences. It 

 prefers a moist atmosphere, and succeeds best on northern 

 aspects. 



Cultivation, etc. The tree is very thickly foliaged, and 

 bears a great amount of shade on moist soils. It transplants 

 fairly well, but takes a few years to become established, after 

 which it makes a very rapid growth, often being 40 feet high 

 when 25 years old. It does not, however, retain this rapid 

 growth after the tree is about 55 feet high ; but it still increases 

 rapidly in girth measurement. 



A close canopy is necessary, in order to prune off the side 

 branches when young. 



The Thuya gigantea is admirably suited for underplanting 

 crops of thinly foliaged trees. It may also be grown in even- 

 aged high forest, either quite pure, or mixed by patches. 

 If mixtures by single trees be required, Thuya and Wey- 

 mouth Pine, or Thuya and Douglas Fir, or Thuya and 

 Sitka Spruce may be planted. In the two latter cases it 

 will usually be finally suppressed, and will have to be cut out 

 as thinnings. 



The tree could also be grown under the selection or 

 group systems. 



Rotation. The best rotation in even-aged high forest will 

 be about 70 to 80 years. 



Average returns. An average annual increment of 80 to 

 85 cubic feet (to 2 inches quarter girth) may be anticipated. 



The question, whether the cultivation of this tree will 

 prove remunerative, will depend upon the reception of its 

 timber in the open market. It ought to sell readily ; but, 

 until this be proved, any plantations that may happen to be 

 made by planting this tree, must be looked upon in the light 

 of an experiment. 



The tree seems remarkably free from attacks by fungi or 

 insects. 



