Thank you for posting the pictures leeyoungjoo. It is so interesting to see them growing in the rock wool. I am curious also as BlueFox is as to depth of the trays. I also like what I can see of the tables you have them sitting on. We would love to see more photos. I understand you also grow sempervivum in the rock wool?
How long have you been growing in this manner? Do they eventually need other organic matter added?
