I wasn't able to find fertiliser online that was simply potassium chloride and I didnt want to source my potassium chloride solution from potassium sulphate or other general NPK fertilisers for my experiment on the effect of varying K+ concentrations on a plant. maybe 50,100,250,1000 ppm solutions. Or is there another element or component of fertilisers, perhaps compounds that lead to nurtient intake that I am overlooking in my methodology
the issue here is the chloride not the potassium. Potassium chloride is very soluble in water. but you could be killing your crops/garden when you spray it on.
Most plants do not tolerate much Chloride ion. With a limit of 500mg/kg of chloride in soil you will not be able to use much of this stuff.
that's wny potassium phosphates are much more desirable. the phosphate will be consumed by the plants.