Evergreen Trees For The Garden

Evergreen Trees For The Garden

Evergreen trees are an important part of the garden, providing not only year round color and elegance, but also shade, shelter and protection for birds and wildlife. There are a number of different types of evergreen trees, and some distinct advantages to being evergreen as opposed to deciduous. Many tropical trees are evergreens, and evergreens are also very common in temperate climates. In colder regions of the world, evergreens are more rare, but still present. From the tree’s perspective, being evergreen requires less work. Deciduous trees require a lot of energy and nutrients in the spring, when they put out new leaves. Evergreen trees, on the other hand, conserve energy and nutrients by slowly growing new foliage year-round, which can be an advantage in regions where nutrients are tight, as an evergreen can endure a rough season, while a deciduous tree might fail. The leaves also provide insulation for the tree, preventing sun and frost damage on the branches and trunk. Evergreens also fertilize themselves, thanks to their nutrient-rich leaf litter, which also acts as mulch to protect the roots.

Some evergreen trees grow new foliage constantly, with older foliage dropping off as it is displaced. Others have slower rates of growth, losing leaves only periodically. In all cases, the foliage remains green and crisp year-round, with paler growth being newer. In spring, for example, new growth can appear almost yellow next to the more mature foliage. Most evergreens have needle-shaped leaves, to conserve water, and many evergreens have slightly waxy foliage, which also helps to prevent evaporation through the leaves.

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