Briercliffe recently returned from South Korea, where an expo attracted 4.3 million visitors and promoted the horticulture industry and green credentials of the nation.
"It would be great to have more in Europe," he said. "The only one is Floriade in Holland. There's no reason why other countries can't do it. I don't see why there can't be another in the UK."
The next Floriade is in 2022, while an expo will be held in Antalya, Turkey, in 2016 and another in Qingdao, China, running for six months from April 2014.
Briercliffe suggested that funding for a UK garden expo could come from the Government, sponsorship, private sources and entrance fees.