Historically gardens include both a kitchen garden and a Physiks garden.
Our ancestors generally relied upon permascaping, particularly at castle or manorial gardens. Orchards and kitchen gardens feuled the internal economy and the physiks garden was for herbs.
Traditional physiks gardens are often laid out in concentric circles or mandalas of intersecting shapes made of different colours ranging from decorative lettuce under roses to pot marigolds. The point is less an aesthetically pleasing one as an effective means of design and one which creates a postive reward system from the serotonin transmitters visa vis meditative walks.