Dunckley hit the headlines when he became the youngest-ever entrant to the Malvern Spring Gardening Show in 2008. He will combine working at Birchfield with his horticultural studies.
"It is a medium-sized nursery at six acres," he explained. Dunckley, who will create a formal cottage garden at RHS Hampton Court Flower Show this year, said he plans to work at the nursery for a year after completing his college studies, before going on to study at Kew Gardens.
"We have got lots of ideas for the nursery," he added. "We need to replace polytunnel covers and we'll put in a planning application for a new greenhouse."
Birchfield will sponsor the young designer's second Hampton Court garden this summer. It will be built by Robert Dunckley's construction firm Sellaway.