How Fast Does Bamboo Grow? - December 2023 Update

It's been 6 months since I planted a bamboo forest in my backyard. I wanted greenery and shade, and I wanted them fast. The bamboo are not disappointing.
In the last month, I've had one new cane pop up out of the dirt and grow more than 7 feed tall!
I've got 15 different varieties and they're not all growing like weeds, but with so many different kinds there is always something happening.