How do sunflowers turn back at night? Why do they always face the sun?

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1. How to turn back at night

2. Why always face the sun?

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When the sun goes down and there is no sunlight, the auxin in its body will rearrange itself and be distributed relatively evenly, allowing it to slowly return to its starting position. At about 3 a.m., it had turned back to its original position facing east. From the time its buds first grow until the flower disc blooms, it will always face the sun in order to absorb sunlight and obtain nutrients.

1. How to turn back at night

1. How to turn back at night

When the sun goes down, there is no sunlight. It will swing back slowly, rather than "snap back" as the rumors say. When there is no light, the auxin in its body will rearrange itself and be distributed relatively evenly, allowing it to slowly return to its starting position. At about 3 o'clock in the morning, it has turned back to its original position and will face east again, waiting for the sun to rise and start a new day of rotation with the sun.

2. Why always face the sun

< p>From when its buds first grow until the flower disc blooms, in order to absorb sunlight and obtain nutrients, it will face the sun. The auxin on its back will increase, stimulating the cells on the side facing away from the light to slowly elongate and rotate with the sunlight. But when the flower disk is in full bloom, it will no longer rotate with the sunlight, but will always face east to obtain nutrients.

2. Why always face the sun?

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