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How Trees Grow The buds, root tips, and cambium layer are the three growing parts of the tree. Buds elongate the branches and widen the crown (branches and leaves), the cambium layer adds diameter to the tree, and the root tips grow in length to support the growth of the tree.
Trees are the tallest of the landscape plants, aside from vines that can grow to great heights with the assistance of a supportive structure. These plants typically surpass a height of 15 feet. Trees draw the eye up and may provide the landscape with shade and ornamental value.