Q.Four O’clocks and Cucumber Plants
I live on the top of the Cumberland Plateau in Cumberland County, Tennessee. That is located just a little west of the eastern time zone; so we are considered being on central time. I started cukes from seed in a plastic container. I dug up my four-o’clocks today to weed where I wanted the cukes. I transplanted the young cuke stalks into that rich, black soil. Is it alright to replant the four-o’clock bulbs around the wide area where I planted my young cucumbers? Now that the cukes are in the soil (front yard with Tennessee stone laid around the garden), how can I be reassured they will not get too cold, and how can I try keeping them warm for chilly nights like we had last night?

Certified GKH Gardening Expert
As long as you leave enough space for the cukes to grow, it should not be a problem to replant your four o'clocks. Also, adding a layer of straw mulch around your plants should help insulate the ground and hold in heat when needed.
Here is an article that you may find helpful if frost is expected: https://www.gardeningknowhow.com/plant-problems/environmental/frost-how-to-protect-your-plants.htm