The breeders and their agents will showcase new varieties, but they must not have been exhibited in Britain before and must be available to UK growers.
Account manager Martin Simmons said: "The event still focuses on UK suppliers to retailers but a stand dedicated to international breeders allows them to show their new plants."
Agents Garry Greuber of Cultivaris and Geoff Needham of PlantHaven will be at the show. For more details email firstname.lastname@example.org
Plantsman Roy Lancaster and Garry Grueber will head a line-up of speakers at the show. Meanwhile, the HTA will launch the British Conifer Group's 'Love me, love my conifer' campaign. For details or to register, see www.nationalplantshow.co.uk