There are different ways to start boxwood cuttings depending on if you're going to do it with semi-hardwood cuttings or tip cuttings.

I'd suggest you go to the Plant Propagation forum here at Garden Web, which I've linked below and do a search in the search box at the bottom of the page to find previous threads there on how to raise boxwoods from cuttings. If a search doesn't pull up something (and I'd be surprised if it didn't, but sometimes the search feature here doesn't seem to work well), then I'd ask this question at that forum so the propagation experts can tell you how to do it.

When I do cuttings I usually use a rooting powder or gel, which you can find at most nurseries and sometimes at big box stores.

Good luck,

Dawn

Here is a link that might be useful: Plant Propagation Forum