Crazy here, too. Today it got up to close to 80, in Dec.! But it was in the upper 30s at night just a few nights ago. Whiplash!

Oh yes, somehow I would not connect Baton Rouge with rose culture, more orchids, and mangroves. May I ask where in Germany you spent some time?

@Spinliesel Ah, Baton Rouge is orchids, azaleas and camellias and some citrus, mostly satsumas and lemons. Most orange varieties are not quite cold tolerant enough for successful fruit production here.
But roses are here, too. They just need to be heat tolerant varieties and either VERY blackspot resistant or else have growers willing to spray preventatively and often. I grew up in the Pacific Northwest and started growing roses there. Moved to the gulf Coast over 30 years ago and had to re-learn gardening rythms and techniques. It is quite different here.
As for Deutchland, ich war Austauschschuler 6 Monaten in Hamburg und 6 Monaten in Seeheim, Kreiss Darmstadt. 1985-1986.

@MikeInBatonRouge It is fun to see what can be grown in a new climate area. My first two years in the US were spent reluctantly in southern Arizona, where I was introduced to concepts like gardening without water and the joy of cacti. I am being sarcastic. I had houseplants.
Roses are quite tough in the right environment, although I have one, la Reine des Violette, that seems to be resistant to all my gardening skills. I am going to have to transplant her to the vegetable patch, the only spot in the whole yard with more than a few hours of sunlight. Ich bin in Oldenburg zum Gymnasium gegangen und hatte viele schöne Stunden im Schlossgarten verwandelt. Oldenburg hat eine große Anlage von Rhododendron und Rosen, mitten in der Stadt.
I saw the same combination of rhododendrons and roses in Portland, a beautiful place.

@Spinliesel I have no interest in cacti either, lol. I hope to retire to western Oregon someday . Great gardening climate! Well, and socio-political climate, too.
The Portland Rose Garden is my favorite I have ever seen, far better than the American Rose Society Rose Center here in Louisiana...up in Shreveprt, 5 hour drive from me. Speaking of Schlossgarten, I just saw a documentary on the Buckingham Palace Gardens, a third of which is a spectacular rose garden. On my bucket list, gotta see that some day.
Your limited sun might actually the main challenge for your poor rose. 6+ hours a day is important. In hot climates like here, we can fudge that a little, but sun is still important, as is adequate water but good drainage. Roses seem picky, but if you give them a few key conditions, they perform well and can bloom much of the year.