Short answer: Sulphur dioxide harms microbes, magnesium sulfate doesn't.More info:"Sometimes, manufacturers add Sulphur dioxide to their molasses. This acts as a preservative and enhances the shelf-life of the product. However, this process can impact the flavor of molasses and also make it unsuitable for use in the garden.
As far as taste goes, the addition of Sulphur dioxide leaves molasses with a chemical flavor. The preservative also acts to kill microbes, which means it will damage beneficial communities within your soil. For this reason, always choose unsulphured molasses for use in the garden." Source: https://www.royalqueenseeds.com/blog-molasses-an-excellent-supplement-for-cannabis-plants-n1148
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Short answer: Sulphur dioxide harms microbes, magnesium sulfate doesn't. More info: "Sometimes, manufacturers add Sulphur dioxide to their molasses. This acts as a preservative and enhances the shelf-life of the product. However, this process can impact the flavor of molasses and also make it unsuitable for use in the garden.
As far as taste goes, the addition of Sulphur dioxide leaves molasses with a chemical flavor. The preservative also acts to kill microbes, which means it will damage beneficial communities within your soil. For this reason, always choose unsulphured molasses for use in the garden." Source: https://www.royalqueenseeds.com/blog-molasses-an-excellent-supplement-for-cannabis-plants-n1148
unsulfured blackstrap molasses is not crap coming out of china with chemicals treating it.