Sunset Glow Clumping Bamboo

Planted as an emergency privacy screen in pots on our back deck, these pricey plants ($60/gallon!) are doing their job well but a little less upright than I’d hoped. The fluffiness is getting in the way of our dining table so I’m trying to decide if adding some type of plant support would look dumb or not. An alternative is to trim back the ones fluffing out in the wrong direction. So far, 6-months and a spring season out, the culms are an average of 4 feet and have spread nicely to take up more space in the planters. I expect they will get to maybe 5-1/2 feet next year, and finally provide the screen I’ve been wanting