The first application has to leave the pitch in the first fertilization after the winter a little stained. But that is probably less on Gritter as to the particle size distribution of the fertilizer. If you choose too small a setting, the car wirrkt like a sieve, and it come out only small crumbs. If we make too far in, rushes expected too much out ... That leaves only systematically try ... Or take the small model of the manufacturer with the dominant color light blue - as you can not adjust anything. The scattering intensity resulting there from "multiple Befahrung" - if you like it ...