Here in Arizona where it regularly gets to 115F, we need to be careful about excessive heat. Cucumbers don’t mind humidity, it’s us that does. To fight the heat, plant in an area that is shaded for the hottest part of the day. A sheet of newspaper hung directly over the plant won’t work, the edge of the shade of a tree works very well. Second best would be 50% shade cloth, creating shade for at least 5 feet on the north side of the plant. Heat travels well, and shade needs to be substantial for the plant to benefit.
To get the most benefit out of the shade of a tree, plant so that the area gets sun for 3-4 hours in the morning, and about the same in the afternoon. My plants are in white 5 gallon buckets this year, allowing me to mo…..