this bizarre nutrient ..

I'm trying to use this weird nutrient during flowering stage .. it's a 4-10-10 npk which is great by the way .. but it's not liquid, it has the structure of the soil exactly, darker than soil though and I think you put directly in soil then you water.. it contains perlite too

3/10/5 would be better. Follow the directions on the product package. Cut this measurement by half or more and see how it goes. If your plant responds well or not at all add more. Be sure to water with un-adulterated water in between dosing.