In my opinion, the cold tolerant clumping bamboos are generally a disappointment in terms of visual impact in a landscape planting. They are very lovely, but attention has to be paid to the background behind them. They are graceful plants with thin canes and small leaves. Fargesia really only work well when the background behind them is not busy with other textures and plants. They tend to disappear visually if the background is too patterned, or in similar colors. Most vendors sell fairly small divisions, with only a few culms (canes) in a pot. It takes many years, to grow a decent clump from these small starter divisions. To grow a clump that will have visual impact, here in Chicago-Milwaukee area, it may take 15 or more years from a 3 or 5 culm division. Eventually a clump of Fargesia will get dense enough to be a good focal point, but most people are not willing to wait the amount of time required. IF you do buy a Fargesia, it is worth spending a lot more to get a large division. Unfortunately the clumping Fargesia bamboo are the only ones that will survive in zone 3, there is really no other option for zone 3.
I'm quite happy with my Fargesia, considering it actually survived a Winnipeg winter. Yes, they may not have the visual impact of a Phyllostachys, but you have to use what you can when a lot of stuff is not hardy here. Just because it is not the best, doesn't mean I won't try it. I'm quite happy to say that I have a bamboo growing in a Winnipeg garden. Mine was in about a 1 gallon pot, and has a few dozen culms, so it is quite nice. Are you sure there are no other options for zone 3? I'd like to try some different ones just to see if I can do it.
Nice, but how do you contain them underground?
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