I've also been meaning to ask- my grandfather did a lot of grafting,
and I would watch him. He used to dip the end of the part he was
grafting into some white powdery stuff he got at the nursery. This
was in the early 1960's. He told me what it was, but of course, I
can't remember. He used this white powder to graft roses, also, and
made beautiful varigated carnations with the same method. Anyone have
any idea what the substance was?

Thanks,

Karen