Firstly, thanks for playing!
yeah, originally it was planned to reward player for flower combinations (they will affect each other) this feature sadly didnt make it to jam release but is planned for post jam updates as i plan to work on this.
as for the flowers, i agree that balancing is quite problematic now. There are in fact few more plants partly implemented in the game files, but sadly they didnt make it to jam version.
Thank you for the honest critique!
I will keep it in mind in future updates.