You did not mention misting or tenting your cuttings to prevent moisture loss and wilting. For your first experiments with cuttings try some of the easier plants. How about coleus or penstemon? Al

I agree with Al....and if you are new to propagating, one well illustrated book you might find helpful is Making More Plants, Ken Druse.

According to Druse, stem cuttings from Eupatorium are most successful when taken in Spring, not Summer.

Then, baptisia - Tony Avent: "Most baptisias root easy in spring when the growth is soft, the success rate drops off to zero as the plants harden. Cuttings should be dipped in a rooting hormone, and then kept in high humidity until they root...usually about 8 weeks."

I sectioned a broken-in-shipping baptisia stem in early June one year, one in three parts rooted - but that was luck, if I'd intentionally planned the cuttings I would prepared them in April or May in my cool zone 8.