Emery Davis wrote
....Black cherry anyway falls into the latter category
(those resistant to juglone poisoning).

=============

But what about the vunerability of the root stock used for grafted weeping
cherry? I don't claim to be expert on cherry rootstock compatibility, and my
copy of "Garner" doesn't provide any good hints. But I'm guessing that
many weeping cherry trees are grafted to root stock which is vulnerable
to juglone.

I do know that over 90% of the time when I've seen good cause to suspect
"walnut poisoning", it has been true.

Gideon