Ground layering? Providing an idea growing environment, a good root system will develop in aprox 45-60 days.

Ankrara's Hobby Corner

Thank you Ankraras. I will wait the 60 days just in case. Good thing you picked up on the difference between ground and air layering because in fact my layer is in the air but without any of the removal of bark etc. I did not think scarifying neccessary as Passion Fruit is a natural walker (I think).
It is in a tray about 3 inches deap, drainage holes, with a wick to stop water logging.
The vine is very healthy with plenty of side suckers, so I will try striking cuttings as well. 60 days is a bit of a wait. Not just for this one but for subsequent ones.