Cucmbers LOVE water. They will need to be kept consistently moist, and once they start to set fruit, will require even more water. Regular watering and a good layer of organic mulch are essential.
Cucumbers are heavy feeders. Plant them in garden soil that has been amended with compost or composted manure. If you are growing them in containers, a good organic potting soil with a bit of compost or vermicompost will work perfectly. Feed garden-grown cucumbers monthly with fish emulsion or compost tea, and feed container-grown cukes weekly with a diluted dose of fish emulsion or compost tea, about 1/4 strength.
Finally, vining cucumbers will require a strong trellis. You could just let them ramble, but trellised cucumbers generally have higher yields and fewer pest and disease problems.