The herbal 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. herbal gardens may be purely functional or they may include a blend of functional and ornamental plants. though they may also be used in other ways, such as discouraging pests, providing pleasant scents, or serving medicinal purposes

Herb gardens developed from the general gardens of the ancient classical world, which were used for growing vegetables, flowers, fruits and medicines. For centuries "wise women" and "healers" understood the uses of herbs for the purposes of healing and magic. During the medieval period, monks and nuns acquired this medical knowledge and grew the necessary herbs in specialized gardens