They do work in soil and are as effective. They just cost more than soil nutes due to lack of significant ammonium sources.You can ,
Hydroponic nutes are designed to dissolve into water ,
But they will work in Soil , doubt it will be as effective ,
I would use 50% Perlite to the soil , should help.....
Ok , soil media based nutes are not as effective as Hydro nutes in a Hydro set-up , i know , iv'e done a test,They do work in soil and are as effective. They just cost more than soil nutes due to lack of significant ammonium sources.