Shrubs are an important feature of the landscape of permanent planting, which is used for formal decorative groups, hedges, screens and background plantings, they contribute to the pattern, color, fragrance or utility.
The natural style of gardening they are simply allowed to grow untended, but in many gardens pruned in spring or autumn, more slender and cause a more compact growth. Many shrubs are beautiful even in winter, because some of the leaves remain green (as in evergreen arborvitae and rhododendron), while many deciduous shrubs have decorative stem and branch shape.
Trees species may grow as bushes under adverse environmental conditions, and the difference between trees and shrubs becoming one of usage rather than strictly botanical characteristics.
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