Buchenwälder im Rosengarten, Nature reserve in Neu Wulmstorf, Germany.

The nature reserve contains European beech forests situated across rolling end moraine ridges in the Hamburg Hills, just south of the city. The protected area spans a large woodland zone with diverse forest types and habitats for typical lowland forest species.

The protected area was established on December 2, 2003, under the management of Landkreis Harburg to preserve one of northern Germany's largest beech forest complexes. This formal protection recognized a forest type that once covered vast stretches of the northern German landscape.

The reserve lies within the Rosengarten-Kiekeberg-Stuvenwald landscape protection area, which completely surrounds it, and it largely coincides with the FFH area "Buchenwälder in Rosengarten". The name Rosengarten refers to the municipality in the Harburg district, not to a garden; the beech woods themselves are the feature the protected status covers.

The reserve lies south of Hamburg in the Harburger Berge, within the municipality of Rosengarten, and is entirely enclosed by the Rosengarten-Kiekeberg-Stuvenwald landscape protection area. The northern sections are managed as commercial forest, so forestry work and machinery may be encountered there. The sources document no marked trails or visitor facilities, so check current local maps before setting out.

The reserve contains an exceptionally high proportion of old-growth and dead wood, creating specialized habitats for rare insects and fungi. These fallen trees are an essential part of the natural forest cycle and offer insights into how ancient woodlands function.