In 2017 Ammerlaan Construction has build a 4.2 ha state of art high-tech greenhouse facility for Bio Gemüse Wagner. With 4.2 ha, the new greenhouse is the biggest organic greenhouse in Germany. The facility is located in Mühlingen, nearby the ‘Bodensee’. Heat is supplied by a nearby biogas installation. Bio Gemüse Wagner will produce lettuce, radish and vegetables in the new greenhouse.