You probably already looked on
IOSPE but it does say there:
"...that blooms in the summer on a 2 1/4' [37.5 cm] long, sharply pendulous, reddish, loosely many flowered racemose inflorescence...."
A long inflorescence plus the information "sharply pendulous" makes me think it might need a basket.
Unless somebody with real knowledge steps up, I would grow it in a basket at first, and see how it flowers. You might decide to repot into something else in the future.