Many years ago I had several long rows of butter beans, and they were ready to pick when it was July and pushing 100 degrees. Remember I was sitting on a little chair with a umbrella taped to the back and going down the rows by myself. Finally got over them, but the next picking I pulled the vines and put them on a trailer and got in the shade and picked them. Was the last time planted butter beans...now I order them from a guy that plants them to sell, figure it not worth the hassle of raising them myself. If you have no way to keep a garden watered most years you end up with your crop going to waste.