Posted 7/22/2015 08:25 (#4693400 - in reply to #4692422) Subject: RE: Latest plant date for sunflowers in southern Kansas
South Central Kansas
In 2007 I planted up until July 29, they didn't allcome up immediately and I had a 1500 lb average, best I have ever raised. I think you'll be okay if you can get them in by August 1.
Mycogen has the best sunflowers, always had good luck with their performance.