Stevia is a marvelous sweet plant, native to the South American areas of Paraguay to Brazil. The locals have been using it for hundreds of hundreds of years before the white man came, and was introduced to this plant by them. The sugar industry, and artificial sweeteners industry as well, are very intimidated by this plant, as their income depends on the general public not being aware of their dangeerous nature to the human body.
Although absolutely no Stevia side effects have been recorded over the years, these industries still claim this plant to be highly dangerous to the human body, and for obvious reasons. As already said, they can not allow the truth about Stevia to be released publicly, as they will be severely hurt by that. The only research done so far regarding Stevia, which was funded by an artificial sweetener company, proved Stevia to be toxic, but only in amounts that would even make water toxic for usage. Of course this company did not mention this fact in their abstract, and caused a lot of confusion among people all over the world.
I would defeinitely recommend for anyone to grow an organic garden, not just Stevia. You can get many advantages by doing that, which of course include an all-natural supply of healthy organic food. You can even get the benefits of vitamin B12, as this vitamin is produced by a bacteria in the soil, and any plant, be it a fruit or a vegetable, usually has some amount of it due to the contact with the soil, and thus the bacteria. The richer the soil, the more nutrient the fruit or veggie is.
You can get Stevia seeds from many places, both in the internet and local plant houses and local markets, but I would highly advise you to buy them from “Seed Savers”, or “Seed Exchange”, as these activists sell the original non-genetic engineered seeds, which are the sources for all the later-modified seeds that are very common today.