I would sugest that you plant them in a pot first with a mixture of peat moss and sand about half and half . Cut the stems just below a leaf node if you can and dip them in the hormone mix. If it is a powder dont use too much as that hinders rather than helps the roots to form. Take off all of the leaves except the very top ones. The cuttings are best about four to six inches long so if you need to trim the top cut them at an angle just above a leaf node and you can plant about a third into the pot.  Water them well and place in a sheltered place and keep moist. If you are lucky they will grow.

Good luck, regards Lulu