[westocast73]

I have saved sunflowers repeatedly. I have had some planted side by side. Yes they can cross quite easily ( especially from the bee's). This though isn't normally a big deal. Most of the crosses don't turn into disgusting things just similar sunflowers. For the most part I would say seed purity for the most part is still above 90% typically. Like I said I saved seeds for a few years already and have never had any really oddball mutants and for the most part everything matches those original pictures.