Chrysanthemum green may be due to the following reasons.
1. Chrysanthemum tea soaked for a long time, it is possible that the chlorophyll contained in it soaked out, which led to discoloration.
2. The temperature of the water may not be well mastered, always remember not to use boiling water.
3. If you use tap water to brew, the metal ions in the water will react with the substances in the chrysanthemums and make the chrysanthemums and the tea soup turn green. And the green color of chrysanthemum will gradually become darker and even bluer when it is soaked in water for a long time. Therefore, there is a certain effect of choosing different water, distilled water bubble will not change color; pure water bubble will generally be light yellow, relatively bright, long time will become light yellow-green; tap water and mineral water is the most easy to change color, especially when the bubble water is water-cooled, and then add tap water or mineral water, it will be able to turn into a green color, such as a long time to be placed can also generate dark green. This kind of chrysanthemum is harmless to human body after drinking.
Hope it can help you...