Bottom heat is helpful. The easiest cuttings to take and propagate are tip cuttings of new spring growth about three inches long. Remove all leaves on the bottom part of the cuttting. Remove all flowers and flower buds. Don't allow them to dry out at any time.
Some shrubs are easy to propagate using stem cuttings.
When they are dormant, cut stem pieces the size of a pencil, trying to have at least three buds. Make a slanted cut on the top so you will remember which side is up. Place a wide sheet of plastic on the table, fill the top half with a layer of damp spagnum moss. The roll should then be set upright in a cool, humid location for rooting. Water when neccesary, provide bright light, keep the humidity as high as possible, provide adequate drainage, and maintain sanitary conditions.