P van Rijckevorsel wrote:

Is it a first? I once heard of a Citrus-tree in Russia which had lots of
grafts of other Citrus-trees
PvR

No, not really a first. People have been doing multi-Prunus grafts
for years. It used to be common to see ads for these "miracle trees"
in the Sunday paper, along with super shade trees (Gleditsia and
Paulownia) and mammoth tomatoes. Anyone with time and patience could
get peach, plum, nectarine, cherry, apricot, and pluot all on one
tree. Aside from the grafting, the trick is picking cultivars that
will all do well in a given region.

Monique Reed