I have the manga of #DahliaInBloom here to read now thanks to @anne and I love it. The drawings are (not surprisingly) much more high quality than the visuals of the anime.
There are some bits where the anime had more details (the part before meeting Wolfred was kept really short in the manga) but there are also details in the manga that I missed or were just omitted in the anime like the self-opening door of the tower that was made by Dahlias grandfather and could not be reconstructed so far.
Despite the anime’s quality, I have to thank it for introducing me to this lovely story.