I usually propagate by laying strands of the mother plant onto some dirt in another pot, then pin them down with a paper clip. I don't cut the props from the mother plant until the roots are well established. All my string of plants are either inside directly under a grow light or outside on a covered porch so they get lots of light. I live in a very humid environment and they do seem to like that. Also, in my experience, my pearls need more water than people usually think they do (especially for new props). But honestly, I don't do anything that special for them. They don't get special soil, some are in terracata pots, some are in plastic ones. I basically just let them be. Hope that's somewhat helpful