Most hollyhocks are biennials, they grow into a plant one summer, die back in the winter and then come up again the next yr to bloom, after that the plant generally dies. I just let seeds fall from mine each summer. Or collect the seeds, plant them in a pot, grow all winter and then plant out in the spring. or just start seeds in the late winter. Easier just to let a few seeds fall, they make little plants, then transplant them in the spring.

Mine reseeded and came up in late winter/very early spring. So I would say, now is a good time to try some. Try just planting half of your seeds. I've also planted them in the spring and had good luck with them.