Hardening off older plants?

The plants in question went through a ten day stretch of 90+ degree weather with very little rain. By some miracle when I got back up there they looked great. It was clear though they may have gone a little limp based on the way the stalk was bending. I'm glad I put them in half day of shade or they would have been goners.

I use metal halide lights and when I move my plants outside with no getting them use to it, they all do fine., unless the weather doesn't cooperate. Cheers

I do a gorilla grow every year, I start in my tent and after 4 to 5 week I take them outside. When I do this they always seem OK. Last year I put them out after 3 weeks and they suffered loads and didn't make it through to harvest.