Tsuga canadensis is a genus that includes some evergreen conifers originating in North America and Asia. They are fairly long-lived trees, which reach 10-20 meters, depending on the species; the stem is erect, and the crown is conical, generally dense and well developed. The bark of the fir of Canada is gray-green and with time it tends to break into flakes, remaining deeply marked; the leaves are flattened needles, gathered in groups of two, of dark green color; they remain on the tree two years before falling and grow in a spiral along the twigs. The fruit of the Tsuga canadensis is a small round or slightly oval cone, containing numerous seeds; it matures in about six months and then falls, or stays on the tree for a few years. This plant is often used for hedges or borders, especially in dwarf species; poorly tolerates saltiness and pollution.
As for the correct location of this type of plant, it is advisable to place the Tsuga canadensis in a sunny place; in areas with a particularly hot climate it is good to repair the plant in partial shade or in full shade.
Generally the Canadian fir does not fear the cold, preferring temperate climates to very hot ones. The plants of this variety are planted indifferently in spring or autumn. Speaking of pruning it is advisable to prune in the spring. This type of tree can easily withstand even massive and vigorous pruning without presenting any particular problems.
The plants belonging to the genus Tsuga canadensis do not like drought, even if they endure short periods without rain, but, in the case of long periods in which rainfall is absent, it is good to water the plant abundantly, at least once every week.
New-growth Canadian fir trees will need special attention to enable them to acquire the necessary strength so that they can develop better.
In spring, bury organic fertilizer at the base of the plant; if placed in excessively alkaline soils it is good to supply sequestrene or iron to the plants, every 3-4 years, to avoid discoloration of the needles.
The fir of Canada is a type of tree that prefers rich, well-drained soils with a wet tendency; the plant does not like excessively sandy soils.
When burying the specimens of this genus it is good to check that the soil has the correct drainage, so as to avoid the formation of water stagnations that could cause problems for the trees of Tsuga canadensis.
The multiplication of this variety of trees occurs by seed or by cutting, in spring. It is good to place the seeds in a soil rich in nutrients and in special containers, which will have to be kept away until the new shoots have gained strength.
Spruce of Canada - Tsuga canadensis: Pests and diseases
Speaking of possible diseases that can affect this variety, sometimes mites and aphids can massively affect the plant. For this reason it is good to intervene preventively with broad-spectrum phytosanitary products, in late winter or early spring. In the presence of pests, then, there are numerous chemical products based on pyrethrum, but it is also possible to prepare natural compounds that will allow you to eradicate the problem. These preparations can be made with water and Marseille soap, in the percentage of 10/20 grams per liter of water. After mixing, proceed with the vaporization on the infected specimens.