Q.Why Do My Cucumber Plants Start Out So Well In The Summer And Then The Leaves Turn Yellow And The Plant Dies?
I provide enough water to them.
Certified GKH Gardening Expert
Unfortunately, there could be a number of issues causing your plants problems. Most can be tested for, though. These articles will help:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/test-soil-for-pests-and-diseases.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/making-sure-soil-drains-well.htm
Once you get your soil how it needs to be, then it comes down to proper care. These articles will help: