Walled gardens make great spaces for your special kitchen garden. Traditionally associated with larger estates, country houses and stately homes many were designed to provide a continual supply of fresh fruit, flowers and vegetables for the ‘big house’. It is the micro climate that walled gardens induce thus creating the facility to grow more exotic fruit trees against walls or with the aide of heated glasshouses.
There are many more discrete kitchen gardens where you can model your own food producing plot with ideas in this National Trust book. Even one well situated wall can provide shelter climbing space and support within a kitchen garden.