Q.Bamboo plants
I have several bamboo plants on my balcony in Scotland northwest facing. I have had them for over two years and they have done well but this winter they are looking a bit miserable and dry at the edges. I am keeping them watered but they still are looking peaky. Have you any idea why and if I can do anything to save them?

A decline in health could indicate disease, pests or a need to divide and transplant the Bamboo.
Here is a link to refresh you on the care requirements.
https://www.gardeningknowhow.com/ornamental/foliage/bamboo/growing-bamboo-in-pots.htm