What I meant by sterile, is sterile in the second generation. I can’t save seeds from the first generation. Those seeds either don’t sprout or they produce something strange. I don’t want seeds that have insecticides in them.
It sounds like you are looking for organic seeds. Each state has a different definition of ‘Organic’ in it’s state code. So be sure to understand what may be organic in one state, may not be in another.
In Iowa, I believe soil MUST NOT have had commercial herbicides and pesticides used on the soil for 3 years before a field can grow certified organic produce. (assuming, of course, that organic seed is planted to this field)
These time limits may vary from one state to another. Be sure to check that the seed you are buying is compatable with your state’s definition of organic.