How long will it take to grow my fro?

I had been growin my hair out for 6 years then cut it 2 months ago, and now I want it back. Im full black and some people say it takes about a full 7 month period. I know everyone's grows at different rates but about how long do you guys think it will take? I started February 25th, that was my last haircut. I know hair grows about half an inch too.