What causes the leaves or stalks to turn yellow?
After considering the possibility of too much light, the next element to consider is the source of the water you are using. If you live in a city where fluoride is added to the water, or has a high chlorine or salt content, one of a combinations of these factors will cause this problem. Yellowing is first seen at the tip of the leaves and then spreads throughout the whole stalk until it dies. It is vital to provide pure, clean water, either by adding an effective filtering system to your tap, or by purchasing water for this purpose. If you suspect that this is your problem, and you improve the quality of your water, allow time for healthy, new foliage to form before concluding that something else must be wrong.
