I saw this and took some Sunday, and thought I'd comment. I did mine (see thread let the cloning begin) with round, rockwool plugs. I took a peek inside to see what was going on with a couple. The split I put in the stem and coated with gel has healed, and there are small white root numbs beginning. I had some leaves yellow, I nipped them off. There are areas where new growth is showing (it looks like pistils starting) on some. Generally, they are green where they should be, and I'm not all that concerned with the yellowing leaves since the clones are from new growth areas on clones taken during flowering, and were reaching the end of their time. Besides, where I pinched off a yellow leaf, there was new growth showing at the node. Hang in there, they will root.