Clearly coffee grounds are not going to determine whether your cucumber plants are healthy and crisp.
Thankfully though, Talerico shared a few other options that will help the plants thrive.
Instead of fussing with coffee grounds, amend soil with organic matter (such as well-aged compost or worm castings) before planting, and then feed the plants with compost tea and/or a side-dressing of slow-release organic fertilizer halfway through the growing season.
You might also want to consider creating a loose and well-draining soil mixture for your cucumber plants, as this will aid in their health as well.
So, working potting soil, horticultural sand, or compost into heavy or compact soils will also help
Now that you are aware of some of the alternatives to coffee grounds that will actually benefit your cucumbers, you may also want to pay attention to your watering schedule.
Cucumbers thrive with consistent moisture, so developing a regular watering schedule is key.