At Domain Aldenborgh we produce a high class organic wine, applying the Free Soil method. Over the years, we have developed this system in order to grow our grapes successfully without any kind of organic or inorganic pesticide or fungicide. Problems that we found hard to control in the past, like chlorosis and downy mildew seem to become less of a problem applying the Free Soil method. A recently started cooperation with University Maastricht makes it possible for us to increasingly understand the natural processes occurring in and on our plants. For the future we might thus be able to use this knowledge to further optimise our program.