HELP – bamboo query

HELP – bamboo query

In October last year, we planted black bamboo. Here are the pcitures from November - don't mind the mess around, they were taken for the insurance when the neighbour's storage crashed on our garden. Apart from a few broken branches, the bamboo survived but since it was bought it has not shown any sign of growth. It's now April and in Holland (The Hague) all plants start to grow now. I fed it with the special bamboo feeding when planting and in the end of February, as stated on the package. I cannot see any new leaves or branches but it does not look dead either, although a bit less green than in these photos. The roots don't seem to have moved either. Is it that the pots are too small? Shall I replant it or is it too late? Would appreciate any advice!
Pink-Zinnia

Pink-Zinnia

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Pest Problem on Basil

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sputnik mirror

sputnik mirror

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i’m new

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I win at plants.