I got my first passiflora 2 years ago and enjoyed it so much that I've purchased quite a few more varities. I winter them over in a greenhouse and they do quite well. My original plant is now too big and I need to prune it before it takes over my patio. I hate to throw the pruned vines away so I wanted to start some new plants but don't know what to do with the cuttings. Do I root them in a soil mix, floral foam, water? Should I use a rooting hormone?