When do you cut the stalks off daylillies after blooms are dead?

When the blooms are gone, the stalks begin turning brown and get dry. When completely dry, they pull off easily with a small tug. Much easier than cutting them...neater, too.

Don't bother to cut them; once they're completely dried out, the pull off easily.

Leave the leaves to die off on their own. They store the energy and food from the leaves to come back the next year.

If they do not release with a slight tug, Mother Nature is telling you something!

Anytime. You want the energy to go to the plant, not to the dying stalks.

I cut the dead blooms off after they are done blooming. then in late fall when the leaves start dying I cut the whole plant down.

I allow most of my perennials to die back on their own. Like Nancy states, it helps the plants to store energy/food which enriches them for the new growing season.

http://homeguides.sfgate.com/daylily-stalks-flowering-done-97264.html

I usually cut mine down to the ground in the fall after everything has finished blooming.