Information and images of around 7,000 old vegetable varieties are available in a database, which will help to rediscover forgotten varieties. Up to now no general figures about the endangerment of old vegetables in Germany were available. In order to improve the scientific basis in this field, the research project "Extension of the 'Red List of Endangered Local Crops’ to include vegetable varieties" was carried out.

This was the first time that a systematic database on the vegetable diversity of the last two centuries was compiled. Historical publications from the time between 1836 and 1956, were used to research vegetable varieties and species and information about a wide variety of historical varieties were collected. In addition to the transfer of historical variety information into an online database, around 3,000 drawings and photos.