Cucumber Plants take around 4 to 6 months to produce cucumbers that are ready to pick.
So plant the cucumber seeds or cucumber plants as soon as you can to allow the cucumber plants to grow and produce cucumbers.
You can start cucumber seeds indoors during winter months and then during spring after the freeze and frost is out of the forecast you can then plant the cucumber plants and then 4 to 5 months later the cucumbers should produce cucumbers that are ready to pick and eat.
Depending on the variety of cucumbers the cucumbers are ready to pick and eat when they are between 3 to 24 inches in length.
Some Cucumbers are ready in 50 days while other variety of cucumbers may not be ready until 70 days or longer.