Four o’clock flowers grow and bloom abundantly in the summer garden. Blooms open in the late afternoon and evening, hence the name.
They will flourish if positioned in a full sun to part sun area; Four o'clock needs only occasional watering and is somewhat drought resistant. 
If seeds are not collected when they form near the end of the bloom season, expect numerous four o’clocks to sprout next summer. This plant dies back to the ground after frost to again return in late spring when soil temperatures have warmed.
Plants can be limited by growing in containers, where they will often take a cascading form.