Inadequate lighting and improper watering causes bamboo to turn yellow. Over-fertilizing a bamboo plant and injury to the bamboo plant can also contribute to the plant turning yellow.
Bamboo needs bright light to grow, but this light needs to be indirect or filtered. Too much direct sunlight causes a bamboo to develop a sunburn, causing it to turn yellow.
Bamboo plants are particular about their water, and tap water may be a culprit. Excess treatment chemicals in tap water can damage a bamboo plant. Gardeners should water the plant with distilled or filtered water and change the water every week.
Gardeners should keep bamboo plants away from animals, protect them from excessive heat and cold and avoid vigorous pruning to protect them from injuries which can cause yellowing.