The Bournemouth-based garden centre group/grower has expanded its bedding production area by 20 per cent in the last five years.
But GAN says the success has made it increasingly difficult for the nursery to release space for the southern horticultural trade show, which operates every February from the site.
Simon Edwards, group operations director, said:
"Those of us that have worked to make this event what it is are immensely proud of what has been achieved and are extremely grateful for the support that all the exhibitors and visitors have shown us over the years. I know that many friendships have been forged and more importantly a great deal of business has been done."
GAN has evolved from a nursery open day in 1994 to become the largest horticultural trade show in the south as well as being the first of the year.
In 1998, 77 exhibitors occupied 150 stands and by 2010 figures had grown to 174 exhibitors occupying 235 stands.
See gallery of images from GAN Trade Show 2011.