I've experimented with Black Mondo Grass and Scotch Moss (startling effect with those dark "fingers" reaching out of that compact velvety neon lime carpet!) in one curve of a walkway counterpointed with a billowy drift of Japanese Forest Grass in the opposing curve...
...But what about JFG in a container? A large one, of course. Several, actually. Am filling a line of large, decorative tubs with altemating annuals and perennials and it seems that grasses would add texture/interest to this predominantly floral grouping. But have not tried grasses in a container before and would not want to sacrifice them to an inhospitable environment... (a 8b rooftop garden, full sun, a bit windy.)
I planted JFG in large terra cotta pots when I first got it - absolutely gorgeous on our patio. I was afraid it might not survive our winter and put the pots in our basement where my cat proceeded to chew it to bits. In the spring I planted the remains in the garden and it survived and thrived for years. I am in Zone 5 & the container grown plants did well on a southeast facing patio. I'm trying it again this year (new house). I love this plant!
Thanks very much for the info! I love JFG, too, especially riffling in the breeze. Suspect if it thrives in a container in your Zone 5 environs, it will probably make it here in my Zone 8b, as well. Lovely stuff, so worth a try, yes?