wmontanez, thanks again for the potato seeds you sent.
I sowed some of them in february and a while ago I already found some nice results.
I had some other pics too, but they weren't so good, but most of the tubers I found look pretty dark, only one pale potato
The darker ones look so beautiful and some tubers were suprisingly big, some of them almost grape sized. I was expecting something much smaller.
I now gave them bigger pots and they seem to be really happy in our coldframe/greenhouse.
Plants seem to be doing well, so I guess there is still chance that the tubers grow even bigger still? At least I hope so...