There are many types of fountain grass, and I think ALL of them are beautiful, and make nice landscape options.

If you put a little extra soil or crappy miracle grow type soil over the top of the area where the plant emerges from the soil, it will help protect it from winter cold and even freezes.

https://www.marthastewart.com/how-to-grow-care-for-fountain-grass-7562842

In the article there is a link you can follow to find our your growth zone if you don't already know what yours is.