About Exhibition Gardening Exhibition - Kassel 2026 will be held from 14th - 17th May 2026 at Schloss Wilhelmsthal, Calden, Germany. This is one of the most comprehensive and expansive show on gardening industry. It will attract more and more exhibitors as well as visitors to participate and direct connect and interact with each other on the most recent market innovations and lucrative business opportunities in the respective industry and expand and explore their business in the global market.