I can’t get cucumbers to grow worth squat. Maybe it’s the clay soil under everything. That is, I’ll dig a hole and then fill it with garden or potting soil plus the plant. Then water, but try not to over water. The plants may produce a couple small cukes, then they die. The plants don’t look starved for water. There are a couple hickory trees (and were modest size walnut trees) not too far away, but the garden is not “under” those trees - the crowns are at least 30 ft. removed @ closest...
Everyone seems to be having Cucumber Troubles this season! Mine are blooming and just starting to set fruit. I am growing ‘Sweeter Yet and ‘Summer Dance.’ Both have all-female blooms and self-pollinate.
If you are having little fruit, pollination is the problem, and you may want to switch to one of the varieties I listed above, or another that is ‘Parthenocarpic.’ These plants produce all female flowers and self-pollinate. Sisters are doin’ it for themselves, LOL!
Here’s the basics on growing cucumbers from The Farmer’s Almanac:
https://www.almanac.com/plant/cucumbers
Here’s a list of Parthenocarpic Cucumber varieties. A few people here will also attest to loving ‘Diva’ cucumber. I’ve grown that one before, too.
https://homesteadcrowd.com/parthenocarpic-cucumbers-best-varieties/