Farmers grow more than 50 million tons of sunflower seeds every year. The black ones end up in our bird feeders, as well as on our grocery store shelves as cooking oil. The striped ones mostly go ...

Sunflower heads can get up to 12 inches in diameter and produce between 1,000 and 2,000 seeds per head. While not all varieties of sunflowers are equally attractive to birds, black oil sunflowers ...