Perhaps the easy way out is to make a clone of each of it's branches. That way you have a good "start" on your next crop. My current favorite strain suffered a root problem during it's last cloning -- bad dirt. Ruined an entire generation. I did manage to save one plant, which I've repotted and am slowly coaxing back to life. The best I can hope for is a few good branches to clone and better dirt next time . . . That's part of the fun of growing -- there's always the next crop, and always room for improvement.