Hi!
From my understanding of JS, sea salt, phyllite powder and red clay powder are optional, as JS is complete without them. They are added to make the end solution clear and becomes nutrient for the crop. It also increases sweetness and better coloring after they are sprayed.
I'm wondering if this is because of the trace minerals from the clay and phyllite?
For someone who has a very sandy soil, what do you think about using these trace mineral fertilizers as substitute for phyllite and red clay powder?
The use of sea salt and phyllite powder helps improve sugar content and color. I think number 1 would be good. I think it's better to use something that is generated in nature.