You can check where you are allowed to consume in public on this website (click the button saying “Verstanden, zeig mir die Karte!”, you are agreeing to a no warranty disclaimer): https://bubatzkarte.de
The regulations don’t apply to private spaces and only when in sight of the protected locality in the centre of the red circles.
And there are other regulations, so many other regulations…
But hey, I can at least legally consume in the privacy of my own home now, so I got that going for me, which is nice.
Bavaria is weedlovers no-go area. Got a joint there , Lebowski? That’s a very big fine, thank you very much!
Maybe not quite that bad, like they still have to apply the federal law, meaning possession and private consumption are still legal and there is nothing much they can do about that. But I wouldn’t recommend it without knowing what you can and cannot do very precisely. They will certainly push the boundaries. Just don’t consume publicly in Bavaria.
Rest of Germany should be fine if you use the bubatzkarte and don’t have more than 25g (~0.88 ounces).