It did take a long time, but the receiving couple was one we hold dear so it was worth it.
Initially I tried printing 3 roses but the retraction messed up my filament. It's already bad for one, let alone the constant switching between 3. Ended up using 0.1mm layers and a print speed of 50mm/s. Took just under 3 hours per rose head.
For the stems I initially wanted those with thorns but that would result in about an hour extra to print the support and I needed 10 (one for every year they were together before the marriage) So I took the one without, made it longer and then printed it with a brim (it has almost zero contact surface with the plate so I didn't want to take the risk). Those took about 45 minutes per piece.
The vase was also printed at the same settings and took about 10 hours. All in all about 65 hours including the mistakes and do overs. But they were really happy with it (or the money we put in the vase, dunno )