1、 Why toward the sun

It itself contains special auxin, which is afraid of light and is mainly distributed on the stem tip. Therefore, when there is sunlight, it will be carried away, and the backlight side will grow and reproduce rapidly. The side facing light will grow slowly and bend over time. In addition, it is also related to yellow oxide and gravity. Yellow oxide can hinder cell growth, and the content of the sunny side is high. Gravity means that it will rotate with the sun in the early and young stages of growth, but not in the later stage

2、 Will you look back at night

Sunflowers don't turn back at night. They turn back slowly after the sun sets, because without light, their auxin will change and redistribute, forcing them to turn back. At about 3 a.m., he began to face the East and waited for the sun to rise slowly. This kind of phenomenon is mainly that before the flowers are in full bloom, they will not rotate after opening, and will always move to the East