Sounds like they are rootbound if your plant is bigger than the area for its roots by that much.

http://boards.cannabis.com/plant-pro...anted-one.html

Answer as many of these as you can (someone told me I overwatered just doesn't strike me a super info) and maybe someone can help.
Weedhound Reviewed by Weedhound on . Leaves look fine, but feel hard... even crisp? Now I had some yellowing leaf problems, and I was told not to bottom water anymore... I was also told that my problem sounded like overwatering. I read just last night that water gives leaves rigidity, and I realized that all my plants have hard leaves... Not at all what good healthy ditch weed feels like... Am I still overwatering? What are hard leaves indicative of?? Rating: 5