Adaptation
Leyland Cypress is light-demanding but is tolerant of high levels of pollution and salt spray. A hardy, fast-growing natural hybrid, it thrives on a variety of soils and sites are commonly planted in gardens to provide a quick boundary or shelter hedge, because of their rapid growth. Although widely used for screening, it has not been planted much for forestry purposes. In both forms of the hybrid, Leyland Cypress combines the hardiness of the Nootka or Alaska Cypress with the fast growth of the Monterey Cypress.
The tallest Leyland Cypress presently documented is about 40 metres (130 ft) tall and still growing. However, because their roots are relatively shallow, large leylandii tend to topple over. The shallow root structure also means that it is poorly adapted to areas with hot summers, such as the southern half of the U.S.A.. In these areas it is prone to develop cypress canker disease, which is caused by the fungus Seiridium cardinale. Canker causes extensive dieback and ultimately kills the tree. In California's Central Valley, they rarely live more than ten years before succumbing, and not much longer in southern states like Alabama. In these areas, the canker-resistant Arizona Cypress is much more successful. In Northern areas where heavy snows occur, this plant is also susceptible to broken branches and uprooting in wet, heavy snow.The tree has also been introduced in Kenya on parts of Mount Kenya
The sap can cause skin irritation in susceptible individuals.
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“Whatever there be of progress in life comes not through adaptation but through daring, through obeying the blind urge.”
—Henry Miller (1891–1980)
“In youth the human body drew me and was the object of my secret and natural dreams. But body after body has taken away from me that sensual phosphorescence which my youth delighted in. Within me is no disturbing interplay now, but only the steady currents of adaptation and of sympathy.”
—Haniel Long (1888–1956)
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—Thomas Babington Macaulay (1800–1859)