Dead Black Stemmed Bamboo.
The dead stems in the black stemmed bamboo is caused by a lack of water
during the summer or as a natural event.Many species of bamboo tend to
die back every 4 to 10 years and then new stems grow from the base.I
recommend cutting back the dead stems and allowing the new young shoots
to grow away.It would be helpful to mulch the base of the bamboo with
bark mulch or spent mushroom compost and apply a general spring garden
feed such as growmore.