About Exhibition Das Gartenfest Kassel 2026 will be held from 14th - 17th May 2026 at Schloss Wilhelmsthal in Kassel, Hessen, Germany. This is a delightful event that transforms the beautiful Schloss Wilhelmsthal into a vibrant showcase of gardening and lifestyle. It is a popular annual event that attracts visitors from far and wide. Discover the latest trends in gardening, from sustainable practices to innovative plant varieties. Enjoy a variety of food and drinks, from traditional German fare to international cuisine. Learn from experts through engaging gardening demonstrations and workshops.