Why do sunflowers follow the sun?

digitS'

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Okay, I missed the audio but ...

I thought I had it figured out: sunflowers become large plants with robust daily growth. Growth occurs mostly in low light conditions and overnight. However, it is sunlight exposure that powers photosynthesis. Photosynthesis is uneven, especially because the plant and leaves are so large; a sunflower has a sunny side and a shady side. After sundown, the western side of the plant does the most growing. That growth pushes the flower bud to the east. The plant leans to the east, to greet the rising sun.

Hope I'm right. :D Steve
 

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