Damn bro that pretty much looks root bound to me. I wonder if that was the reason you buds stop swelling and the hairs and leaves were acting a little funny? Maybe five gallons is too small for four foot plant? Maybe seven gallon pots are the best way to go? I think I'm using five gallon pots right now (not certain b/c it seemed like I put seven gallons of soil in them lol). I think I might pick up some seven gallon pots for my next grow, so long as I can fit them in my space w/out any problems. Something to think about bro. If you want to keep rocking with five gallon pots, maybe schedule a "root" pruning at some key point in the grow, just insure they dont get root locked again. Cut of about third of the bottoms roots, and replace that space new soil, gives the plants room to keep growing during the flowering. I've did it on my last transplant and the plants stopped growing for about three days, but then took off. IDK, pruning is messy and pain in the ass, so I think I will get some seven gallons next.
My parents told me that alot I wonder if they were getting high?????? 
No worries though I will get my setup done here soon. I just need to get my lineup down so I know when to clone so I have a steady harvest of 6 plants a month for me and my MMJ patients. 6X2.5X$250........... I love being in the medical feild.