Here's another photo.

I noticed they started to have this powdery white look on some of the leaves.

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Sorry, but you should have done something when you first saw that powdery while look.

Powdery Mildew(Fungus), if left unchecked can kill cucurbits. But with early spraying and treatment plants can continue going.

It will take a miracle to revive those cucumber plants. IMO.

Your cukes are dead. Seysonn is quite right, it's too late for them.

To me cucumber is the hardest crop to grow within the curcubit family. I'd experienced the same failure like yours a few months ago. Next year I'm going to try grafting the cucumber onto something that has stronger roots that are not susceptible to root diseases, like maybe a pumpkin.

First, that's not enough growing medium for cucumbers. You need a bigger pot and fill it to the top... One hot summer day will kill that plant instantly. Mildew or not, you never had a chance to get a cucumber or two.

Veggies are not herbs. They need room to grow roots and when grown in containers, they need to keep those roots from drying out in a hot Kentucky sun.... The mildew was most likely just the final blow to an unhealthy plant.

Cucumbers are not hard to grow in most climates.

To Ceth_k, cucumbers are very easy to grow in the Ohio/Kentucky area. Grafting is not even a reasonable idea here. They grow like weeds.They just need to be sprayed with copper or daconil on occasion.

What i meant is that cucumber is not the most hardy plant in curcubit family. Even in this single first page of forum there are two posts regarding diseases and problems of growing cucumber. A lot of people face sudden death of their cucumbers but not many face sudden death of their pumpkins.