Does anyone have any information about what trees could grafted .
I am trying to complile a database of tress that be grafted .

Cheers

It would be a much shorter list if you listed those you can't graft--I don't know of any, but would be interested in knowing if there are any.

There are some incompatibilities, and in most cases you can't graft across genus, though there are a few.

Laumbert, Welcome to the forum.

Check out this link: http://www.lal.ufl.edu/publications/pubsale/sale.htm

And look for the Florida Citrus Rootstock Selection Guide.
This might be what you are looking for.
Darren