One of the added attractions to growing daylilies is the ease which with they may be crossed to develop new and different flowers.

Some basics:

Diploid (Dip) and Tetraploid (Tet) daylilies will not cross. 

Plants grown from daylily seeds, while they may be similar, are not duplicates of either parent plant. Each seed, even those in the same pod, carries its own unique combination of genes, and may be very different from both the parents and siblings.

Keep good records of your crosses. Tying small paper tag to the base of the pod parent flower is one economical method. Keep this identifier with the seeds through final planting.

Not all daylilies are fertile. Some will only be fertile as either a pod or a pollen parent. 

Be patient! It may be as much as two years from planting of the seed until you see the first bloom from your effort. But the thrill of seeing that first bloom, knowing that there is no other exactly the same, makes it all worthwhile.

The Mechanics

Daylilies are very easy to hybridize. Simply pluck the stamen from one (the pollen parent) and brush the pollen on the tip of the pistil of another (the pod parent). Do not remove the spent bloom from the pod parent. It will drop off when its task is complete. If the pollination was successful, a small, green, barrel-like seed pod will begin to grow in two to three weeks. The pod will continue to grow, and when the seeds are ripe, the pod will begin to dry and split. Harvest the pod before it splits open completely. Collect the seeds, let them dry, and then plant. The seeds may be refrigerated for later planting. Plant seeds in a good potting mixture, keep moist but not overwatered, until they sprout. When they are large enough, transplant into your garden.