Martin,
Will you please tell us how you rooted your Black Ischia? I know that some have purchased trees and until your post, I have not found any posts about successful rooting of Black Ischia. I know that John (jsvand5), Herman, and Sue V has posted about it but I think you are the first to post about and show a picture of a successfully rooting.
I haven't had any luck and I am truly interested in what you did. I have read about notching, angle cutting, or smashing the cut end. What did you do?
JD