What can i give my 6 month old to stop him from getting constipated? i've tried juices and fruits and nothing helps. his stool is really stiff and dry

Constipation : At 6 mos of age you should introduce solid foods, give a lot of fruits , Vegetables, juices even prune juice , water it down for him, not too much apple nor bananas, make sure his pediatrician is aware of this problem particularly if he had it since birth , he might need to do some tests to R/ O Hurshsprung disease. Good luck.