Like Walter mentioned the flowers are bugged and will be fixed in next update.
For the other flowers they are purely decorative for now. Might add more for crafting later, not sure yet :)
For release on Steam I honestly don't know. Whenever i feel i have enough content and systems ready and few enough bugs for an Early Access release it will be added.
Might be this year, might be next. Since i work alone on this i don't have a fixed timeline for anything and jump between things randomly so very hard to say.
And thank you for the kind words! :)