Not bad. You might consider that when time to transplant, to put them into potting soil. 5 gallon buckets each full of soil. You could probably continue with just the sphagnum, but you'd have to use fertilizer. Be careful how much you use. Make sure it has trace elements like boron, sulphur, etc. Miracle Grow fert has this stuff but the NPK seems to be too much for this kind of plant. I usually recommend Dynagro and I'm sure people here are tired of hearing it. But it works good for soil grows. Just follow the direction on the back. There are small 8 or 9 ounce bottles available out there. Schultz brand seems to be good too. There are almost too many ferts to choose from. You'll have to decide what to do.