The herb garden is often a separate space in the garden, devoted to
growing a specific group of plants known as herbs. These gardens may be
informal patches of plants, or they may be carefully designed, even to
the point of arranging and clipping the plants to form specific
patterns, as in a knot garden.
Herb gardens may be purely functional or they may include a blend of
functional and ornamental plants. The herbs are usually used to flavour
food in cooking, though they may also be used in other ways, such as
discouraging pests, providing pleasant scents, or serving medicinal
purposes (such as a physic garden), among others.