What do seeds look like, did you manage to save any?@Branching Out very nice pic . Bamboo in bloom only happens once in 20 years or more .
All the bamboo from that same mother bamboo plant will all bloom at the same time no matter where they are located.
From what I understand bamboo must have many flowers at the same time to spread pollen. Flowering is most likely so that the new seedlings will receive water , nutrients room and sunshine to start new stands of bamboo culms instead of the mother plant.
My black clump bamboo . Black Bamboo (Phyllostachys nigra)
Flowered 3 years ago in several locations around the garden at the same time and are just starting to push new shoots or culms from the seeds pollinated from the mother plant.View attachment 68501