Each bloom starts opening the night before and is wide open the next morning.

Thank you Edward.

jean

Smoky Mountain Autumn is a good example. It actually starts to open early evening (around 7) and by next day is fully open. The only disadvantage I've ever found with "norturnal blooms" is that the blooms attract slugs which come out at night as the blooms are expanding.. By the next day the blooms can be all chewed up......Maryl

A second problem can be irrigation, which is often timed to come on before sunrise. For those using overhead irrigation, the spray can thrash the flowers before you even get to view them. Also, the flowers can be going into decline late the following afternoon, after many people arrive home from work, but out enjoying the garden before dinner.