Hi. I'm new to these plants but I have been collecting some for about three years and planting them in my rock wall. So far I haven't had any die and they seem to be flourishing! I had no idea how to go about planting them in the wall since there isn't any dirt between the stones, it's an old stone foundation from a farm building. On a whim I shook off all of the potting soil from the roots, reached down and grabbed a handful of mud, shaped it into a ball around the roots and pushed it into one of the spaces in the wall. Our soil is heavy, sort of clayish. I've repeated this with all of them and to my surprise they seem to love it. Since I had such success with this I thought I should share. If anyone has a better method or any tips to improve my method I would love to hear them. These plants are so cute! I got most of mine from someone selling them by the bucketful from a stand in their yard with a cash box. They were 2.00 a bucket but I have no idea what their true names are.