Because bracts contain a small amount of chlorophyll, trace elements remain in the plant when they bloom and wither in the later stage, and a large amount of carotene is decomposed, and finally only chlorophyll is decomposed, so the color of petals will turn green, and light will also affect the color of palms.
Therefore, it is a natural phenomenon that the white crane taro turns from green to "green palm" after flowering for a period of time. There is no need to be too surprised. At this time, the "green palm" is about to drip, like a perfect handicraft, and it is also very ornamental.