I've done more or less that method but without the hydrogen peroxide. If the seeds have been stratified (damp chilled) first you shouldn't need peroxide to break any seed dormancy. At the strength they are using (which isn't actually specified by ratio) peroxide may not do much anyway. You can actually stratify the seeds in the baggies of damp perlite in the fridge for three or four weeks then just move them to room temperature (not in the sun) for germination. Or, plant the stratified seeds right into their pots and skip germinating in the baggies. That's just a matter of personal preference if you want to see them as they germinate.
You may find this article from the AHS Daylily Journal useful:
http://www.ctdaylily.com/files...
