I wanted to correct some of the specifics in your response.
In North Texas where I grow, I have plenty of fruit set at > 90 degrees daytime temp (which is typically from Jun through Sept and sometimes well into Oct). I do agree there is a point beyond which fruiting is not possible, but I think 90 is way to low. I typically don't see the mid-summer lull until temps are close or above 100 degrees. As soon as we get a few days below 100 (I am talking about 95+ still but < 100 peak daytime), I get a flush of fruit set. This is in a Southern facing full sun trellised raised bed. I bring that up to let you know the soil temps are also quite high during our summer.
I wanted to correct some of the specifics in your response.
In North Texas where I grow, I have plenty of fruit set at > 90 degrees daytime temp (which is typically from Jun through Sept and sometimes well into Oct). I do agree there is a point beyond which fruiting is not possible, but I think 90 is way to low. I typically don't see the mid-summer lull until temps are close or above 100 degrees. As soon as we get a few days below 100 (I am talking about 95+ still but < 100 peak daytime), I get a flush of fruit set. This is in a Southern facing full sun trellised raised bed. I bring that up to let you know the soil temps are also quite high during our summer.
Thanks