This is a picture of The Eden Project in Cornwall England. This is a polyculture design of permaculture. Conventional farming uses monoculture planting. This makes the plant more susceptible to pests and disease.
Kitchen garden with herbs and flowers as companion planting. http://dawn.hickernell.homesale.com/listings/query.php?feat=1&aid=034101941&oid=034100020&temp=2010&aname=Dawn+Hickernell&aimg=1&agent_hasfeat=37&