Why are my cucumbers curling?

Cucumber fruit curl is a deformity mainly caused by pollination issues, poor growing conditions and insufficient nutrition. The proper term for a cucumber curling is ?crooking.? It is a common condition for the sensitive cucumber.

Hand pollination decreases the risk of crooking, which can result from poor pollination caused by dry settings or too much rain. To provide proper growing conditions, soil must remain even, moist and at temperatures over 60 degrees Fahrenheit. Adding 6 ounces of 13-13-13 fertilizer added to the soil before planting the cucumber provides the proper nutrition to prevent crooking, and 6 additional ounces should be added every two to three weeks as the vines begin to grow.