Start image after Darktable`s auto scene-reffered modules aplied.
First exposure up by 0,5 EV without any masking.
Second exposure applied 1 EV up for red flowers.
Third exposure applied 0,5 EV in center of each flower, with large feathered masking.
Filmic Rgb don it`s job.
Local contrast applied on flowers.
Color zones darker and less saturated greens, with a slight yellow hue.
Denoise, chromatic auto corrections applied.
Click for larger size, wallpaper 16:9 - 3840 x 2160 !!!
Bonus for #blackandwhite only
And one more for fun !!!