I fell in love with the Biergarten im Schlossgarten - aka Stuttgart's unofficial (but totally official) biergarten the first summer I was here, because the Stuttgart 21 rail project had broken ground, when it was surrounded on all sides by a beautiful park full of trees and often hippy protesters living in the trees (to protest their eventual removal).
As the previous reviewer noted, it seems odd that the biergarten today is "next to a treatment facility" - well, no it's next to a construction site, as they're building a massive new train facility underneath the area. It does detract from the beauty and peace the biergarten once enjoyed, at least on one side.
However, the biergarten is still the biergarten, and it's still the only proper Bavarian-style biergarten in Stuttgart, it's still a 5-minute walk from the main train station, or even less from the Staatsgallerie U-Bahn stop. It's also in the middle Schlossgarten, so it's the perfect break from biking, walking, running, or whatever you're doing between the Neckar river and the Mitte in the "Green U" of Stuttgart.
Pluses:
-You can get beers in 3 sizes - small (0.3 liter), halbe (0.5 liter) or a mass (1 liter!!) If you live in Stuttgart, ask for a "bierpass" - every time you buy a mass of bier, you get a stamp towards a mass at the Sonja Merz tent at the Volksfest in the fall!
-Proper benches under proper chesnuts trees - watch out in the fall, you might get hit!
-Public viewings of major football tournaments (better camp out a bench hours in advance of the match!)
-Fast self-service counter for food and beer
-You can bring your own food
-No better place to be on a sunny afternoon or warm evening
-They have appelmost (a kind of apple cider nobody but me likes) on tap!
-Live music on weekends and some weeknights in summer
Minuses
-Not the cheapest place to drink
-The food is not that good and not as cheap as you'd expect. Yet one always gets hungry after a few biers in the open air, right? My advice is to stick to basic things like wurstsalat, griebenschmalzbrot, obazsta, etc. The more complicated the dish, the less appetizing it's likely to be.
-Unpredictable hours, especially in the spring and fall, when they close if it's not sufficiently warm outside. Even on warm nights, they tend to close at 11pm, sometimes earlier if the staff just wants to go home. They can be a bit rude about it.
Overall though, this is my happy place. You'll find me here at least twice a week from April - early October (when they close for the season). Every visitor I've taken here has fallen in love with it to. It just sucks there's not a better place to eat nearby (bring a picnic if you can manage it - maybe from the Markthalle?)
Special tip: Around 10pm at night, they try to get rid of food, so all dishes are 2 for the price of 1. Sometimes they ring a bell to advertise it, sometimes they don't - so if it's after 10pm, ask! read more