How long does it take sunflower seeds to get dark?

Sunflower seeds turn dark at maturity. This occurs approximately 30 days from the last anther of plant development, and becomes noticeable when the backs of the sunflower heads turn yellow.

Keywords: sunflower seeds, sunflower seed maturity, dark sunflower seeds

About this Author

Kelli Bingham is a freelance writer with nearly a decade of experience in the field. Her works have been published in publications including eHow. She is currently pursuing a degree in business.