With 31 members, up from 22 last year, the event continues to establish itself as one of Europe's premier vehicles for launching new bedding and pot plant varieties as well as marketing initiatives.
UK based Floranova featured in last year's programme and the company will be returning in 2010. Marketing manager Kate Monahon said: "It's quite exciting. The event has grown rapidly and evolved quite a bit in the past few years."
The new area crosses the border into Holland, covering the Rheinland-Westfalen region and incorporating four new Dutch members.
Last year eight German breeders ran their own "Euro-Trials" at the same time. But now a deal has been signed by Flowertrials chairman Jeron de Kuijer and Euro-Trials chairman Frithjof Gutberlet that will see the Euro-Trials brand discontinued as it becomes incorporated under the Flowertrials banner.
Monahon added: "From our point of view the deal makes sense because people only have to travel once. If people can get around the trials in four days it makes more sense and it makes the schedule much more practical."
As part of the event, companies will open their doors for visitors from all over the world in week 24.