Mainau’s Herbaceous Garden is a fascinating sight at all times of the year: the dark blue delphinium, sneezeweed (Helenium ‘Rubinzwerg‘), candle knotweed (Bistorta amplexicaulis ‘Blackfield‘), globe thistle (Echinops banaticus ‘Taplow Blue‘) are just some of the many perennials found here. The flowers of the Patagonian verbena (Verbena bonariensis) appear to dance in the summer wind, whereas the flowers of black-eyed Susan (Rudbeckia fulgida) add dashes of bright yellow in late summer. The ocean of pink-coloured cone flowers (Echinacea) is just as impressive.
More than 20,000 plants in over 700 different varieties can be seen in the Herbaceous Garden: prairie and steppe plants are skilfully combined with magnificent perennials like oriental poppies, peonies and day lilies. The Herbaceous Garden is still attractive even in autumn and winter when grasses and shrubs provide interest with their diverse coloured barks and fascinating structures.