I have it growing in 9B. I grew it from seed, have no idea what kind it is (I had one option, "asparagus").
In fact, I have it growing in a container (a large box, like a deep kiddie pool. My dirt is very rocky and full of clay and I decided to make my life easier). It is in a corner of my
yard that gets mostly shade.
I have seen videos of people growing asparagus in urban settings in southeast Asia (maybe Singapore?).
I do get occasional frosts but I don't have a set hot and cold season the way North America does-- I will have a cold snap for a few days, then back to daily variations between 40F and 70F, for example. The asparagus never goes dormant, and I'm never really sure what I
should be doing with it. It's only about 4 years old and I've divided it twice, but yields are still small.
But I would imagine if you get a firm cold season you would probably be okay.