The name is ironic, as there is a german TV show called Fernsehgarten (basically television garden). It's broadcasted live every sunday morning during summer season on ZDF, basically it's a outdoor studio with music and other things around a topic every week.

Mostly targeted to elderly people, but funny to watch every once in a while. You can even go there in person for quite cheap

The name is probably inspired by TV Garden from Nam June Paik from the 70s