Hi Trace, many thanks for this --- I'm delighted that the seeds reached you and that you are so enthusiastic to plant them!
Hi Jenny, the way that I collect the seeds is that I pick the flower heads after the flowers fall off and put the flower heads in a large piece of fabric, like a sheet. I then gather the four corners of the sheet to make a large bundle with the flower heads in the center, and I smack the large bundle on the ground and with my fists to dislodge the seeds. Then I gather the seeds on to a large dish or tupperware, and put them where they can dry.