Sunlight, roses and grapes have all turned purple. What happened?

1, insufficient light: Sunshine Rose Grape is a plant that likes plenty of sunshine. If you stay in the dark for a long time, its leaves will turn purple. This is due to the lack of chlorophyll in plant leaves, which leads to the display of other pigments.

2, low temperature: In a low temperature environment, the leaves of Sunshine Rose Grape will appear purple. This is due to the change of chemical reaction in plant leaves caused by low temperature, which leads to the change of leaf color.