I have had good experiences with iron(II) sulfate and dolomitic lime for my lawn. They increase the green colour and prevent moss.
However, I am uncertain whether I should avoid applying these two mineral salts at the same time. I assume that the alkaline conditions provided by the lime promote the oxidation of Fe²⁺ to Fe³⁺ by atmospheric oxygen on the soil surface. I think that Fe³⁺ is less available for plant uptake than Fe²⁺. Furthermore, Fe³⁺ is immobilized in alkaline conditions.
Therefore, I image that I should apply the iron(II) sulfate first and wait until after the next rainfall before applying the lime.
Is my rationale correct, or am I making too much of it?