I've just bought some large, contemporary trough planters in which to plant phyllostachys nigra (black bamboo). They measure 98cm(L) x 33cm(D) x 33cm(W) (3 ft x 1ft x 1ft) and have straight sides.
However, I'm a little concerned that they will be too small for the bamboo - I have the opportunity to cancel the order if necessary.
Any advice would be appreciated! Many thanks.