I have found over the last 5 years that this is one of the best ways to propagate Passiflora cuttings, with the right amount of bottom heat and the humidity created by the mist unit above the cuttings I have found that some cuttings have rooted within days as against weeks when the cuttings have been put into a pot of compost and put into a heated propagator.

Picture by kind permission of Mike of Simply Control