I have just repotted some newly acquired roths and the older leaves are showing some signs of yellowing which I was told was normal as a consequence of the bare rooting process. I have read many previous posts about the benefits of live sphagnum on promoting root (but not top growth) and was wondering if anyone has tried incorporating some live sphagnum just on the top layer of the potting compost with the rest still conventional compost (bark+charcoal+coarse perlite)? I was thinking would that also help to improve the humidity at the root base to promote rooting too? There are loads of good sources of live sphag I can get in the UK and they are harvested to order.....any suggestions?