It's hot in Phoenix

[estación seca]

Pore opening in crassulacean acid metabolism plants depends on light presence or absence, and absolute temperature. If it is dark and the temperature is correct, pores open. It doesn't require a day/night difference. My understanding is almost no crassulacean acid metabolism plants open pores at 30C/85 F and above. Many plants suffocate below this night temperature, however. It varies from species to species.

Can you open windows at night?

[rbarata]

Originally Posted by estación seca

Many plants suffocate below this night temperature, however. It varies from species to species.

Can you open windows at night?

Do you mean higher than?
I've tried to let everything open at night but it doesn't change anything that much. The heat accumulated by the walls starts to be released at night into the house so it's like having heaters on. That's why temps don't change. Also, the absence of wind makes it more stagnant inside.