A few months ago I transplanted some of my Polianthes tuberosa into a pot filled with leca stones. They seemed to like it better than regular potting mix, (or maybe it was because I was paying more attention and watering them more often). So I transplanted some other Polianthes into leca stones, as well as my Hymeoncallis. This will be an interesting experiment to see how these bulbs perform outside in full sun in pots of leca stones. I will be sure to keep them well watered. Dennis in Cincinnati