Air layering !!! :)

This propagation technique is awesome! - Although I've yet to see if it actually works, but the theory is pretty cool. Air layering is essentially getting a plant to form roots from its branch so that it can be cut off and become a separate plant. The new plant with its roots is still attached to the donor plant so it continues to receive water and nutrients as normal whilst growing roots from an injured and light restricted area.

The benefits of doing this rather than taking cuttings is that you can get a larger section of growth (bigger new plant), and an artificial environment (nursery) doesn't need to be provided for the cuttings.

How to do it...

Select a section of previous or current seasons growth (depending on plant)
with healthy growth and vegetative buds.

Make a slit to the center of the stem (don't cut all the way
 through) about 1.5cm long with a sharp knife.
The roots will grow from this wound.

Wedge the cut apart slightly with a bit of moss so that
it doesn't seal closed. Then wrapped the whole
section of stem in wet sphagnum moss.

To keep the moisture in wrap in black plastic and tie in
place

It can take about 5-6 months for the roots to grow enough to sustain the new plant once it is removed from the donor tree. So be patient! the best time of year to do air layering is in early spring when the sap starts to flow for the new seasons growth.