The inspiration behind the competition, open to registered members of the Society of Garden Designers (SGD), was to raise awareness of Garden Organic in promoting organic gardening methods, preserving knowledge and safeguarding rare varieties that were once common in British gardens.
It is a collaboration between the restaurant, Garden Organic, Hartley Botanic and the SGD.
SGD chair Juliet Sargeant said: "I now know there is no such thing as a typical kitchen garden.
"Raymond Blanc and Garden Organic gave a complex and challenging brief for this project and I have been amazed by the variety of design solutions that our members have produced.
"I am really looking forward to hearing about the design concepts from the designers themselves when they visit Le Manoir in September."
A winner will be chosen after the shortlisted candidates present their proposals during the September visit.