Q.Cucumbers Never Turn Green
This is the second year that we have tried to grow cucumbers. They grow to enormous size, 12-15 inches, but they never turn green. They are bitter and the seeds are hard. We had the soil tested last year and added nitrogen on their suggestion. Why do they NEVER turn green? Thank you!

Cucumbers that never turn green are due to a lack of pollination. For more information, please visit the following link:
http://www.walterreeves.com/gardening-q-and-a/cucumber-not-turning-green/
Here is another article on white cucumbers:
https://www.gardeningknowhow.com/edible/vegetables/cucumber/white-cucumber-fruit.htm