Why did you start breeding piwi varieties?
Blattner: As a young man, I went to French-speaking Switzerland for a year straight after school, actually to learn French, but I worked for a winegrower there. I enjoyed working in the vineyard, but I quickly became disgusted with the weekly spraying of the vines. It was clear to me that I didn't want to do viticulture under these conditions. Therefore, I had to find an alternative and started to grow my own varieties.