I have uploaded a photo of a few bamboo trees in the back yard. They are about 5 years old. Recently I have noticed sprigs of flowers on them. Is this normal? Also they have got rather bushy and unwieldy. If I were to cut Some of the bamboo shoots will it kill the plant? In general the bamboos don't appear to be doing well. Thanks for any suggestions
You may cut bamboo shoots, but don't cut all. That is the source of new growth with young vital energy.
From the photo it appears that your plants have poor growing conditions with only a small strip of soil, which appears dry and compacted.
Increase the open soil surface area if possible; leave the leaf litter as a natural mulch to insulate and retain soil moisture. Provide more water during the dry season. Fertilize. The better growing conditions that you can create and maintain soil and water management, the healhier your bamboo plants will be.