Why is my bamboo falling down? Does it require trimming or a trellis? I want it as a wall.
Bamboo does not require a trellis. "Trimming" will permanently remove growth without producing anything to replace it. If your bamboo is falling down, it could be for a number of reasons, including voles eating the roots. Hard to give any helpful advice unless you post a picture or two, and give more details, like growing conditions and how long you have had it.
Post a picture please.