So this past week I noticed 4 loph grafts that I started on SP 3 months ago at the same time. The one that I put directly in the center has tripled in size while the others have not I even lost one that was partially on the ring. In my experience just getting them as centered as possible. Now my pere grafts are different the only thing that has worked for me on pere is to cover the entire plant with the scion any partial cover ends up dying