@Zeromitch - I'm sure this is a silly question but, have you got a fan that rustles the leaves? A light passing breeze helps strengthen the stems. I'm almost certain you already do.
The only other thing I could think of is maybe adding a silica supplement. I think AgSil makes a very inexpensive version.
https://buildasoil.com/products/agsil16h-potassium-silicate
The only other thing I could think of is maybe adding a silica supplement. I think AgSil makes a very inexpensive version.
https://buildasoil.com/products/agsil16h-potassium-silicate