The Grow website aims to encourage people to consider the diverse job opportunities on offer in the sector.
The decision to create Grow came after a report found 62 per cent of 13- to 18-year-olds nationwide thought horticulture was another word for farming and the majority believe it is a career for "old or retired people".
The new website is aimed at everyone but especially school leavers, career advisers and those interested in changing careers.
TV presenter Chris Beardshaw said: "I am delighted to be part of this initiative, which for the first time pulls together all the key players to communicate and facilitate the options open to anyone wishing to make horticulture their career."
The website was built by HW publisher Haymarket and is supported by the RHS, Royal Parks, Lantra, Royal Botanic Gardens Edinburgh and Kew, NFU, National Trust, HTA, CABE Space, Landscape Institute and English Heritage.
- See www.growcareers.info