Why is it that fruits and vegetables make my stool hard instead of soft?

I’ve always been told that vegetables and fruit have fiber in them and make you regular. However, I always usually get constipated after eating vegetables or fruits. I don’t drink much water though. 1 glass a day. What this have anything to do with it? Plus, do I still need to drink water along with fruits and vegetables to make myself regular and not constipated. I eat greasy foods and then I’m not constipated explain this please?

terms

    can vegetables make your stools hard , do vegetables make you constipated , eating plenty of veggies but still constipate , food to eat to make your stool hard , when i eat lot of fruits why do i have loose stools , why eating vegetables can make you constipated , Why is my stools very soft