I can't answer that question. But I can tell you I am aware of a Yuzu tree in Vancouver, WA (not Canada), which is a big seven foot tall bush and one year produced 50 pounds of ripe fruit, I am told. The tree, including most of the other hardy citrus trees, tend to produce fruit off and on, every other year (with different trees in fruit each year). I think going as far north as Seattle, you get less heat, so the trees might have to reach a much bigger size to begin fruiting, and to reach that size could take a long time (maybe 5 to 8 years, I don't know). Several years ago I did encounter a blog where someone claimed they were growing a Yuzu tree in Vancouver, BC, and they said it produced many fruits. The blog even contained a picture. The blog disappeared now, but I did save the picture.