Amateur designers mentored by Joe Swift have four days and a limited budget to build show gardens in different styles - including cottage gardens, formal gardens and conceptual gardens. Judges are James Alexander Sinclair and Ann-Marie Powell.
They will be judged on how well they have met the brief, their horticultural knowledge, design skill and the sense of theatre that the garden brings.
The competition is filmed at gardens including RHS Garden Harlow Carr, Sudeley Castle, Painswick Gardens and RHS Garden Wisley.
The show will broadcast on BBC Two in May, probably across four days on 11-14 May.
Viewers will be able to follow the progress of the winner as part of the BBC’s RHS Chelsea Flower Show coverage.
The series starts with six amateur designers and in each episode, one designer will win the Judges Gold, while another will be eliminated.
The six designers chosen from hundreds of entries are: Gillian Potts, Jo Manfredi-Hamer, Paul Harris, Rob Dawson, Sean Murray and Steph Humes.
Harris studied garden design at at the London College of Garden Design and qualified 2013.