|I've never had much seccess|
They are not too difficult if you provide a moist but not soggy growing mix and use fresh cuttings that have not yet become woody. Dip them in rooting hormone. Stick them in a 50:50 mix perlite and vermiculite. Then place them in a humid chamber in a bright area out of direct sunlight.
The following web sites provide good help on rooting techniques:
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