[Tracydr]

Originally Posted by Gardeneer

Of course, categorically, fertilizers are in some kind of composition/form, called "salt".
Natural inorganic soil is composed of salts( Debries from rocks/stones that make the soil ).
If there is such a thing as "Salt Build up" it can happen in potted plants that are in the same small amount of soil for years. In a garden bed with massive amount of soil, fertilizing a few pound per 1000 cubit feet of soil per year is not going to make a dent. Plus, those "SALTS" {{nitrates ... sulfates ...) eventually are used up by the plants or leached down/ out. . It is possible to supply too much of "P" and "K". because they mostly stick around longer. But "N" in all forms are readily water soluble. So they cannot become accumulated.

So anyway, my main question was not about the merits of ORGANIC fertilizers but WHAT those FISH fertilizer supply in addition to N, P, K, Ca,, Mg, Fe, S, ..that are also found in synthetic fertilizers.

Gardener.

Salt buildup is a huge problem in arid climates. Kills plants frequently.