Jack Herer Grow (Topkat5)

I continue to be amazed at the speed in which this Jack Herrer from Seedsman is growing. Recently, I ran into a little bit of weird bleaching/yellowing of my leaf tips on some of the newer growth but not on any of the older growth, so I need to do some research on that issue before it becomes a bigger problem. I may roll another 2-3 weeks in veg before switching to 12/12 for flower. I would like to veg until December, but I'm worried about vegging too long in the 5 gallon and getting root bound, plus I don't know how much I'd feel like dealing with a 7-10 gallon pot.... But who knows Stay Swift, Mates!