Can I use this product?

Is it okay mix pure potassium sulfate with water in a bucket and then just drench the soil?

I also have some Ferrous Sulfate heptahydrate to help with an iron deficiency . Is it best to mix with water and foliage spray? Or add to soil?

Get some azomite it’s got like a hundred major and micro trace elements and nutes in it. But no nitrogen or phosphorous. I’m not sure what the stuff you have is I’m gonna have to look it up.

Alphachemicals.com

I bought them off amazon. The FSH is high in iron as I have a plant showing an iron deficiency I think at least lol.

The other I just bought cause apparently it’s great for plants...

I’m just having a tough time with instructions for use. Nothing on packaging and having trouble finding it on their website

Yes you can dissolve water soluble potassium sulfate in water and water your plants with it.