The name says it all - the blossoms open when the sun rises and then close when the sun sets. Actually, each flower only lasts 1 day and then a new one blooms on the next day. There are many flowers to each plant/stalk. Daylilies are very easy to grow - almost too easy - they are another one of those flowers that can take over your garden if you do not thin them every couple of years.
My favorite daylilies are the orange ones but they come in every color imaginable.
Daylilies are beautiful as cut flowers also. Enjoy them outside and inside.