How about a misting system?
Just thinking about this low tech (or it can get sophisticated) way of lowering temps in the garden.
Has anyone tried a misting system? What experience have you had. Don't want to drown the hosta or host a slug convention, but done properly, I think a mister could do a lot to lower temps in specific areas of the garden. I had a misting system based on a five gallon bucket and some emitters, but my DH found it and used the bucket for other purposes and threw out the tubing. It was a few years old, of course, one of those ideas I never got around to implementing on the carport at MoccasinLanding. In that case, keeping the parrots cool was the objective. But, I gave up the idea when one of the birds developed a fungus from so much humidity, and had to be moved into the house air conditioning.
One thing I'll experiment with is bringing a hosta pot into the house where it is around 80 degrees. I do not keep a cold house, just lower the outside temp a bit and suck out the moisture to be comfy.