Grand-post doesn't specify what kind of fruit the region their parents live in specializes in, and plenty of fruit grows on trees (citrus, stone fruit and apples leap immediately to mind).

And I know that some Washington apple packing and Florida citrus packing companies have declared bankruptcy in the past year, so those would be my guesses.

If you have to argue about nomenclature then your argument is probably not worthwhile.

Yes, fruit grows on trees. Did you assume the comment was necessarily about grapes?

While technically incorrect, tree is informally used to describe grape vines in some regions. Similar to “tomato plants” which is a more common example.