I am growing cucumbers for the first time and I saw a video saying they will shrivel unless you pollinate them. Find a male flower with no cucumber behind it, pluck it and peel back the leaves and touch the center to the center of a female blossom with cucumber behind it. If you don't do this they will shrivel. I know there are a type of cucumber
seeds that do not have to be pollinated. But I am a newbie so don't know much else that what I was on youtube.