No drainage holes? That will likely lead to boggy stagnant soil. If the planter is deep enough it should not be an issue. The standard approach is to have a tough plastic root barrier sunk into the ground.
40cm deep is insufficient for any bamboo i know of.
a bamboo should be in the ground. there are two types, runners and clumpers, you need to know which you have. put a clumper in the ground. put a runner in the ground WITH a root barrier.
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a bamboo should be in the ground. there are two types, runners and clumpers, you need to know which you have. put a clumper in the ground. put a runner in the ground WITH a root barrier.