I didn't quite realize how precise the hardening off process had to be. I took a couple of my most mature plants out into the sun for an hour one day, a week later, 3hrs, then 3hrs again about a week later, and again, and although it seemed to do fine with this, I left it out for ~5hrs and...it's not my biggest plant any more, for sure. Lost a lot of leaves to burn, and all of the other plants i did that with got pretty crispy too. Definitely gonna be more careful, and not push it, next time.