Shrub is one of the four main groups of plants in terms of size and form. A shrub is a perennial with woody stems that is smaller than a tree. Shrubs usually have several low stems branched near the ground. They also are called bushes, especially if they have many branches (see Bush ). Trees have one large stem, the trunk. Shrubs differ from vines because they stand up without support and do not climb. They differ from herbs because they have hard, woody, long-lived stems. Shrubs grow in almost all parts of the world. They provide cover and food for birds and game, and they protect the soil from erosion. Shrubs are popular for ornamental planting along foundations of houses, in gardens, and as hedges around lawns. Many shrubs produce fragrant blossoms or decorative leaves, twigs, and fruits.
Most shrubs will grow in well-drained soil, spaded to a depth of 11/2 to 2 feet (46 to 61 centimeters). Smaller plants may be spaced 2 to 3 feet (61 to 91 centimeters) apart, the larger ones 6 feet (1.8 meters) apart. Transplanting may be done in fall or spring. For best growth, prune old branches.
