The Sequoiadendron giganteum or gingante sequoia is a tree of majestic size native to North America. It has an erect stem and conical crown, which becomes almost cylindrical with the passing of the centuries; there are specimens of heights close to 90 m and with a trunk of diameter close to 10 m. The bark is reddish brown, deeply cracked, very thick; the branches are horizontal, or facing downwards, with the apical part facing upwards; the leaves are needle-like, with a triangular section, gray-green in color. In late summer it produces small round pine cones, containing numerous dark seeds, which can remain on the tree for many years. These trees are used only in parks, since they need large areas of land; they are very long-lived and can survive for centuries, the growth is quite fast, especially for the first decades of life of the plant.
The trees of giant sequoia they love sunny positions, but develop smoothly even in partial shade; young specimens of Sequoiadendron giganteum should be sheltered from the sun in the summer months; these large trees do not fear the cold, preferring places with cool climates, in any case it is good to shelter young trees from the cold winter winds.
The most suitable habitat for its development is that between 1000 and 2700 meters above sea level, with a preferably humid climate, but with hot and dry summer periods and several hours of sunshine for direct radiation. Sudden changes in temperature can weaken the plant and cause serious damage, even if the giant sequoia it can withstand minimum temperatures reaching -25 ° C and maximum temperatures up to 40 ° C.