I have half a dozen seed pods from a wild Fl strain light blue iris. They are spreading slowly rhizome wise. I would like a long portion of the bank at the water's edge to be covered with iris. How do I propagate plants from these pods? The pods seem mature 3-4 months old. Stems now have tipped towards the water. Some of the pods were in the water.
One pod was laying in the water & it seemed as if the seeds were developing into tiny bulb iris roots, rhizome like. Two of the pods had separated from the stem.

Let the pods dry & plant the seeds?

How deep to plant?

Put pods back in the water. Allow them to develop there. When the pods are soft & mushy, remove the seeds & plant?