Can it really be done?

[Retrograde]

7. They grow in the US - in Hawai'i

There's a very small part of California where they'll grow and ripen. They may also grow in Florida but I have no first-hand knowledge of that.

AFAIK, they're very sensitive to day lengths: they like steady light levels throughout the year to fruit so do best in the tropics. I've kept dwarf ones alive indoors south of San Francisco, but they've never bloomed, much less set fruit.

There actually is a variety, M. basajoo, that grows, flowers, and fruits outdoors in San Francisco, but the fruits are small and inedible. Handsome tree, though, with impressive flowers.