That definitely doesn't look like daylily roots to me (maybe a ditchlily since they have runners and such instead of regular roots like daylilies)
On the seeds, no you do not have to wait until Sept to plant. In your area, you really need to plant now so you can have the seedlings planted in the ground or pot or wherever by September 15th. If you plant the seeds now they will be about 6 weeks old come Sept 15th. Planting by Sept. 15th gives it time to get rooted in the ground good before the cold comes plus it will help you to get blooms the following spring (no guarantee)
Around here we started planting our seeds the end of June and first of July. I still have a few more to plant and I will be done.
