Posted: 17/08/2017 at 14:23
Organic seeds are guaranteed to not have been treated with anything to protect them from pests or help them to germinate, such as being coated with fungicides. 'Normal' seeds may or may not have been treated. If you want to sell produce labelled 'organic' then you can only do that if you know for certain that the seeds hadn't been treated.
I think that's the only circumstance that I'd worry.
As there would be such a tiny amount of chemical on a treated seed, the amount transferred into the plant would be so small that I doubt it would be measurable. However, if you believe in holistics (which I don't!) then the smaller the amount of chemicals, the stronger the effect is supposed to be (which makes no logical sense, but there you go.)