Southern climates and greenhouses just won't do well in summer. I agree with Karen as she has had hands on in your climate.
Here I move everything out in summer and still place most of it in the shade.
I keep shade cloth up in the greenhouse year around. If I recall, it was 60%.
A suggestion to keep your plants hydrated. I place them in trays with a shallow lip. Then I water the trays so the plants draw water from the bottom of the pot. When they have become hydrated, I can easily dump the water from the tray. It takes less effort and prevents water or soil splashing on your succulents.
Good luck...
