Cestrum nocturnum Night Jasmine Cestrum is not a true jasmine. The night blooming name is more accurate. Actually, the flowers remain open for several days, but the scent is only produced at night. All of a sudden on a warm summer night, a powerful, heavy, almost hypnotic scent drifts away from the plants on any breeze.
Some people find the scent too intense.
I think it smell really exotic like some imagined scene from Arabian Nights. Night Blooming Jasmine is not even as hardy as citrus. Temperatures in the high 20's will damage it some. But it does really well in containers, and that incredible scent makes the effort worthwhile. In San Diego, an evening stroll through older neighborhoods will bring repeated drifts of the scent, as it is a common enough landscape shrub in that favored climate.