Jan and Nicole brew very small quantities of beer with old heirloom oat and barley varieties they grow themselves in their small village, Alverskirchen, near Münster, Germany. They also partner with neighbouring organic farmers who provide their spelt and other aromatics that they infuse in their beers. 

Fliärblome is a barrel-aged sour ale to which Jan and Nicole added elderflowers that they foraged next to the brewery. They let the blossoms macerate in the beer for a few days and then racked it into red wine barrels. After a year, they blended it with some Aoltbeer to balance it out.