Just reread your very first post when you say that you have passive cold air and you never let the temps go above 25.
I'd be aiming higher in flower at around 27 to 29 and minimum off light temp of around 22 23.
May not seem much but they like a little cooking and at 25 in flower they might only just be ok
Also I think your 11ltr pots were too big for your 3 week veg plants, their root system will not have filled the pot size.
Very dark green too going into flower and during, too much nutes.
I'd look into that expensive soil you're using too.