Eco dye: red day lilies

A few months ago, a girlfriend dead headed her red day lilies and gave me a bag full of dried flowers to use for dye.  I'm finally getting around to using them.  Yesterday I rolled them up in some muslin fabric and tied them with string. They then went into a pan to simmer in a shallow amount of water.  Now I play the waiting game for as long as I can stand, or until they start to smell!  Hope to leave them for at least a week before unrolling the bundle.