Prior to theconference, the former owner of Red or Dead will visit unnamed garden centres and his talk will give an insight into what he discovers.
GCA chairman Peter Burks said: "We are thrilled that Wayne will be returning to the conference again. This year he will be digging deep to take a look at the state of the industry and will be able to share his thoughts as to what direction he thinks the industry should take in 2013 and beyond.
"By visiting some of our member garden centres, much like Mary Portas visits shops, he will be able to offer his thoughts on areas where we excel and where opportunities exist. He will look at future trends and offer his unique take, using his extensive knowledge in urban landscaping, retail and fashion, to suggest ways to capitalise on them. We’ve dubbed him King of garden centres."
Also speaking on 28 January are broadcaster Carol Klein, Garden Centre Group MD Kevin Bradshaw and 'success coach' Michael Heppel. On 29 January, secret millionaire John Elliott and Olympic marketer Greg Nugent are speakers.
The GCA annual conference will take place from January 27 until 29, 2013 and will be held at the Crowne Plaza Heythrop Park near Chipping Norton, Oxfordshire.