Culinary herbs add color, flavor and texture to foods. While a number of these are low-growing, ground-hugging plants, herbs such as dill, sage, oregano, tarragon and coriander reach 2 to 3 feet in height. The striking foliage of these lofty plants adds fragrance and texture to the garden while producing a profusion of tasty, green springs that can be plucked from the plant and added to soups, salads or casseroles, giving homemade meals a fresh, piquant touch. Alternatively, entire plants can be harvested and hung to dry, then used as needed throughout the year.
Certain herbs are grown for their pleasing aroma rather than their tangy taste. Tall, fragrant herbs -- such as lavender and lemon balm -- produce flowers and foliage that fill the garden with a delightful, heady scent all season long. Their compact, bushy forms grow to 3 feet tall and 3 feet wide, making them an excellent choice for use in low hedges or informal borders. Additionally, their brightly colored stems contrast nicely with other garden plants and work well in mixed arrangements.
Some herbs are valued more for their appearance than for other, more practical reasons. Decorative plants -- such as bee balm and borage -- are among the few herbs that produce stunning, showy blooms, attracting hordes of bees, butterflies and hummingbirds to the garden. The colorful clusters of flowers are supported by slender, 3-foot stems and surrounded by coarsely textured, deep-green leaves that look lovely when used in cottage gardens or perennial beds.
Growing herbs for medicinal purposes is a time-honored tradition. Long before the invention of modern medicines, herbs and herbal concoctions were used to treat any number of disorders. Nowadays, most people see a licensed health care professional to cure what ails them, but many still grow plants such as peppermint and catmint in the garden. These lanky, easy-to-grow herbs often reach up to 3 feet in height, producing an abundance of leaves that can be harvested and used in restorative teas and soothing ointments.