On 12/01/2021 15:08, Jeff Layman wrote:


I grow Phyllostachys nigra ("Black" bamboo), and it's taken 7 years to
double its clump-size. It hasn't spread.

Same here in more than decade it hasn't really spread. Its' got a lot
thicker in the middle of the clump but hasn't spread by more than a 6
inches in any direction at ground level. Now some shots are coming out
at 45 degrees rather than vertical. I cut off shoots that don't end up
reaching to the sky. For most of the time it also stayed at around 5 to
6 feet but now some shoots are up at 10 feet, again not a problem
because they are thin and airy - think tall grass rather than tree.


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