My clump is roughly 14' tall this year, slightly taller than the last 2 yrs & still growing. It hides my recycling bin and has a Musa Basjoo next to it. It is in a southern exposure & needs lots of water. I have 8' stakes, 2 guy wires, and lots of thin rope holding it into a tight vertical shape. Otherwise it would be about 8' wide spread with some stalks knocked down by wind & rain weight. It gets thin branches on it. You can break the stalks in your hands unlike Bamboo. It's easy to keep from propagating by digging & chopping the rhizomes and the seeds are said to be sterile. I don't mind the work. It grows for a month before the last freeze and for about a month after the first frosts.
Fall care I dread though. If I don't cut it all down before the blades dry up, many blades break off and blow all around my yard and neighbor's yards. And they never rot. It takes about 2 solid hours to cut & bundle it all. On a good note, I use it as kindling.
In the foreground is a small Needle Palm. And a bit off topic: Behind the Needle Palm is a solitary fence span that hides my trash can. I combined styles from 3 different picket fence types. The circular cutouts in the pickets come from a railing style I saw in the Practical Magic movie. In South Florida and the Caribbean, flower and pineapple cutouts are often used. And now back on topic: This green palm & white painted wood color setup was somewhat influenced by a painting called Patrick's Porch by Alice Dalton Brown. It's worth looking up. I'd post a link but I'm not sure what the artist's and re-seller's policy is for posting links to them.