Summer Squash Curling

Question

My summer squash leaves are curling upward. They are blooming but not producing.

Answer 1

Plants leaves tend to curl when the plant is not getting enough water. Try increasing the water to the plant. This could also be affecting the plant's ability to produce fruit as well.

But, just in case, these articles may be useful:
https://www.gardeningknowhow.com/edible/vegetables/squash/squash-blossoms-falling-off-vine.htm
https://www.gardeningknowhow.com/edible/vegetables/squash/squash-fruit-falling-off-the-plant.htm
https://www.gardeningknowhow.com/edible/vegetables/squash/pollinate-squash-by-hand.htm