Rosarium Uetersen, Rose garden and botanical gardens in Uetersen, Germany.

Rosarium Uetersen covers over seven hectares around two ponds, the large and small Mühlenteich, in a strict geometrical layout designed by landscape architect Berthold Thormählen with rose breeders Mathias Tantau, Wilhelm Kordes and Krause. It holds more than 900 rose varieties in some 35,000 plants, with an emphasis on climbing and standard roses. The large pond is split by the Hochzeitsinsel, reached by bridges from both sides; a garden café, restaurant and hotel stand on the grounds.

The garden was designed between 1929 and 1934 by landscape architect Berthold Thormählen and formally opened in 1934. Its creation coincided with the town's 700-year celebration and established the location as a major center for rose breeding.

Several rose cultivars carry the garden's or town's name: the pink climber 'Rosarium Uetersen' (Kordes 1977), its sports 'Uetersens Rosenkönigin' and 'Uetersens Rosenprinzessin' (introduced 2009), and the cream climber 'Uetersener Klosterrose' (Evers/Tantau 2006). The garden also holds a café, restaurant and hotel, and the Hochzeitsinsel in the large Mühlenteich is used as a wedding venue.

Information plaques at many rose beds explain the varieties, their breeders, and origins, making it easy for visitors to learn about individual plants. The garden features accessible pathways throughout and is best visited during warm weather when the roses are in bloom.

An island called Hochzeitsinsel sits in the center of the larger pond and connects to both garden sides via two bridges. This small feature creates an unexpected focal point that changes how visitors experience moving through the space.