I discovered that daylilies are one of the easiest flowers from which to collect seeds. After the flowers have bloomed and died back the portion just behind the bloom begins to swell and form a pod. The pod starts out green and supple the seeds are not ready yet. Allow the pod to turn brown and dry out. If the pods have split open it’s definitely OK to collect the seeds. There are usually several 1/8″ diameter black seeds to a pod.