Trees are a crucial and integral part of the ecosystem. They are essential to maintain the balance of the ecosystem, to prevent soil erosion, and to keep environment pollution-free. Adequate water and food supply, sunlight, and optimum temperature are required for their proper growth. Every plant has a different growth cycle and life cycle. Some plants grow slowly, while some are fast growing. Trees that grow fast use nutrients for exceptional leafy growth. Here are some examples: It is a member of small genus of fir trees. It maintains a symmetrical, characteristic shape from top to bottom. Seasonal growth begins in spring, and it survives in the harshest of climatic conditions. It is one of the fastest-growing, evergreen trees. It grows very wide and can be used as an ornamental showpiece. It can withstand extremely cold climate. It grows to the size of a Christmas tree within two years. It is conical-shaped when young, and columnar when mature. This evergreen plant is perfect to create a dense, evergreen hedge. These trees grow very thick and have soft texture. It is a pod-bearing, tall plant with a short trunk. Its elegant foliage is lacy with medium or fine texture. The height of a mature tree is about 30 - 70 feet. Its fall foliage is yellow or yellow-green in color. Its fruits are reddish-brown and strap-like. It is tall and wide, with drooping branches that reach the ground. It grows to a height of about 8 - 10 feet within a year under ideal conditions. Its narrow, small leaves appear in late winter, offering the tree a golden look. As these plants mature, they become green and turn yellow in autumn. They grow vigorously in dry, as well as moist locations and alongside riverbanks. It grows up to 80 feet in height. It has deep-green leaves and masses of tulip-like flowers during the spring. The leaves turn to a blazing, golden-yellow color during fall. It is a valuable shade tree, which is highly resistant to diseases and insect attacks. It is one of the quickly growing trees that grows up to 3 feet every year. Its foliage has an attractive silvery underside, which turns orange-red or golden yellow in fall. It is one example of rapidly growing beautiful trees. It provides rich-flavored, sweet nuts during fall. This tree is ideal for planting in the lawn because it shed its leaves in late falls and is resistant to the insect attacks. It is about 100 feet tall and 70 feet spread. It is one of the fastest growing plants. It reaches a lofty height within one year with little care. It can grow over 20 feet in height in a span of 3 years. The flowering period is during hot summers.