Sunflower Fields off of Interstate 5, Willows, Yolo County, California Posted on June 24, 2013June 24, 2013 by V Sunflower fields, northern California. After many trips by these beautiful sunflower fields I decided to stop and take some pictures. They are beautiful and there are several fields in northern California. Sunflowers produce sunflower seeds and sunflower seed oil. Sunflower Fields, Yolo County, California. Sunflower field, and oak trees. Sunflower fields in Yolo county. Sunflowers and blue sky. Sunflower and Blue Sky. Sunflower in a field of sunflowers.