As I mentioned before, the success rate with cuttings is extremely low. Julian says it's about 6%. Better than 0%,I guess...
On the other hand, layering works nearly 100% of the time.
So...
If you were to go into the propagation business, I would do it two ways: 1) for branches you plan to remove, air layer them. 2) to make good use of "trimmings", graft them onto JBP seedlings. Let them grow for as long as you like, then airlayer them!
Just because they "can" be grown as cuttings doesn't mean that's the most efficient way.
On the other hand, layering works nearly 100% of the time.
So...
If you were to go into the propagation business, I would do it two ways: 1) for branches you plan to remove, air layer them. 2) to make good use of "trimmings", graft them onto JBP seedlings. Let them grow for as long as you like, then airlayer them!
Just because they "can" be grown as cuttings doesn't mean that's the most efficient way.