Dear Charleen, there are many crosses of Hamamelis, some are crosses between your native species and the Japanese Witchhazel which produces untold intermediates.
However your native one is Hamamelis virginiana can be grown from seed, the others are bst done as below.
Propagation: In the wild, reproduction is primarily from seed. The mature capsules burst open explosively discharging the seeds up to 30-40' from the parent plant. Some seeds are dispersed by birds. Witchhazel seeds should be harvested as soon as the fruits mature in late summer to early fall and sown in a coldframe promptly. Fresh seeds may take up to 18 months to germinate. Seeds allowed to dry on the plant or stored after maturity will require two months of warm stratification, then one month of cold, followed by another two weeks warm and another four months cold - then a long wait for germination. Scarification may improve germination speed and percentage. When the seedlings appear, prick them out and pot them up for overwintering in the greenhouse their first year. They can be planted out late the following spring and will reach flowering size in about six years. Witchhazel suckers freely and also can be propagated by layering in early spring or fall. Layering works well, but the process will take a year. Softwood cuttings can be rooted under mist in the summer. Volunteer seedlings can also be potted up and transplanted.
Hope this helps a bit!
Regards and a stunning plat, for I love them.
Neil.
p.s closer look of the Broom!
I drool over 
I'm learning quite a bit here and real easy on the eyes. 
I find myself here more than on my cubit. 
