That's some kind of a commitment, look forward to see the process. I think the my longest period of growing was 6 month without a trim, would be nice if I could do a whole year, but I'm pretty sure that I can't, haha! I tend to grow it out, then trim it down, regretting the trim, then grow it out again, then trim it down, regretting it again, etc etc.

Wish you the best of luck.