I visited this WHS in Summer 2019. I visited Kromeriz early in the morning and honestly I wasn't expecting much more than a pleasant stroll in the flower garden having visited several other inscribed gardens and castles.
The viewing terrace panoramic view (photo) over the flowers and the Rotunda was the highlight during my trip. The flower garden of Kromeriz is a rectangular axial concept established in 1665, featuring impressive geometrical clipped hedges and floral ornaments. The sophisticated visual layout based on symmetry and perspective leads the visitor through the garden as through a mythical labyrinth, revealing original architecture, sculptures, mazes, water elements and garden art. A marble UNESCO WHS inscription plaque can be found next to the flower garden entrance just before the Dutch garden. Even though the flower garden of Kromeriz is very well kept, it is no match for similar gardens in France and Italy and in my opinion lacks any particular OUV. Being relatively close to the Lednice-Valtice cultural landscape with rather similar flower gardens doesn't help even though visiting both WHS on the same day, was a very enjoyable day out for my parents, who enjoyed having the tranquil gardens mostly for themselves for most of the time.