Picture of some very large sunflowers seeds from China. I plan on trying these this year. They supposedely grow to nearly 14 ft. tall. The seed is listed on the USDA as 'Ames 22280' link to the page http://www.ars-grin.gov/cgi-bin/npgs/acc/display.pl?1484033 send me an email (sunflower_info@yahoo.com) if you want to know how to obtain your own seed.