The garden maintains a focus on indigenous plants of Schleswig-Holstein within a broader representation of plants from around the world, including special collections of South African succulents and plants from the Atlantic islands, as well as Adromischus, Aizoaceae, Aristolochia, Campanulaceae, Crassulaceae, Cuscuta, Passiflora, Plumbaginaceae, and Vitaceae.
His early studies were on the genus Cuscuta in which he described 67 new species and 39 new varieties.
They feed on a wide variety of plants in the west, including Arbutus and Cuscuta species.
The greater dodder or European dodder, Cuscuta europaea, is a parasitic plant native to Europe, which belongs to the family Convolvulaceae, but was formerly classified in the family Cuscutaceae.