BOPP will now "look to the future and consolidate" said HTA horticulture head Raoul Curtis-Machin.
Former HTA director and now director general of the AIPH, Tim Briercliffe, gave a talk on BOPP's history at the event which was held at HTA headquarters in Oxfordshire.
He said there was no assurance scheme for ornamentals in 1996 when BOPP was launched.
Global Gap followed BOPP and had a big influence on the market "and BOPP will now look to the future and how to adapt and be more flexible." said Curtis-Machine
For instance BOPP could incorporate plant health and help retailers deal with challenges like xylella, Curtis-Machin said.
He added: "No one predicted retailers would set to their own schemes bespoke to them but BOPP still has a USP as unique to ornamental and that's its core strength."