How what form of elemental sulfur are you using?
SOP 0-0-50 is 17% sulfur.

You could do the math or just skip the sulfur app the month you put the SOP down.

 

How what form of elemental sulfur are you using?
SOP 0-0-50 is 17% sulfur.

You could do the math or just skip the sulfur app the month you put the SOP down.

This is way wrong. Elemental sulfur is not the same as the sulfate in SOP. Also, the elemental sulfur will yield extra hydrogen to lower the pH. The SOP does not.

 

Sulfur (S) and sulfate (SO4) are as different to one another as hydrogen (H+) and Water (H2O).
After N, P and K, sulphate is the most used nutrient by plants.
Micro-organisms convert elemental sulfur (S) into sulfuric acid (H2SO4) which rather quickly breaks down into 2H and SO4. The 2H acidifies the soil while the SO4 remains as a source of nutrition.
Past research has revealed no maximum level at which SO4 is toxic.
In addition, SO4 tends to leach relative quickly.

 

This is why I like Epsom salt, has some SO4 content, but situational as always given Calcium level.

I think Elemental sulfur may as react with other compounds in the soil, something to consider.
But it's probably better than using Citic Acid, unless chelated metal Ions in the soil is a good thing.

I think we need to dig into this from more of a chemistry to point, because if plants will absorb chelated metals via roots better than citric acid is 100% the way to go...
I don't know if that is true or not though...

 

You can put 5lbs/1000 of elemental sulfur out at once and then wait to do another 5lbs/1000 application. You can definitely put too much out at once.

 

And how long should one wait before second 5lb application?