Flottbektal Nature Reserve

With only eight hectares, the smallest nature reserve in the Hanseatic city received its protection status on June 1, 1982. The wet meadows are part of the last flood plains in Hamburg that were affected by the tide and are home to many animal and plant species that are on the Red List.
The Flottbek, the river that flows through the site and flows into the Elbe at Teufelsbrück, gives it its name.
Source: Wikipedia

Marsh marigold and snakewort characterize the colorful landscape of the wet meadows. In 1982, the southern part of the Flottbek Valley and the adjacent forest were declared a nature reserve.
The Elbe River tides characterize the course of the Flottbek stream in the southern part of the park.
During storm surges, large areas of the valley's meadows and willow thickets are submerged.
Habitats affected by flooding have largely disappeared along the Hamburg Elbe and are therefore particularly valuable. To preserve the species-rich meadow vegetation, the areas must be mown twice a summer.
Culture and nature have always been closely linked in the park. The scenic Flottbek Valley, the forest on the Geest ridge, and the old solitary oaks were respectfully integrated into Caspar Voght's model agricultural estate.
The rich natural features and the long history of gardening have led to a great diversity of plant species. Bulbous plants from Southern Europe, such as wild tulips and checkered lilies, were planted in the park. Black knapweed arrived in the 19th century with "contaminated grass seeds" and, in summer, adorns the drier meadows near the Eierhütte with its reddish-violet blossoms.The park also offers numerous habitats for wildlife.jenischparkverein.de/flottbektal