It contains a special auxin, which is afraid of light. It is mainly distributed on the tip of the stem. Therefore, when the sun shines, it will turn its back, and the backlight side will grow and multiply rapidly. The light side will grow slowly and bend over time. In addition, it is also related to xanthogen and gravity. Xanthogen can block cell growth, and the content of the sunny side is high. Gravity refers to the early growth and tender period will rotate with the sun, later will not
Sunflower doesn't turn back at night. It turns back slowly after the sun sets, because its auxin will change, redistribute and force it to turn back. Wait around 3 a.m. to start facing the East, waiting for the sun to rise slowly. This kind of phenomenon is mainly before the flowers are in full bloom, they will not rotate again after opening, and will always face the East.
