I recently rebuilt my entire
yard, the house I bought was owned by a very old man who did a lot of damage including rototilling the entire yard, he left it all lumps and bumps, his composter contained his nitro medication, his dentures and a set of silverware, so he wasn't quite right. half the yard was moss due to his using the wrong chemicals, and walnut
trees growing all over. quite the disaster, I killed off the moss and what grass was here with vinegar and iron, leveled the lawn, moved all the good plants, reseeded the grass, spread myke and blood meal as suggested by my soil test and 3 weeks later have cut my new grass, I plan on staying organic. We bought a farm once that had been sprayed so many times with atrazine by the previous owners that nothing would grow and all the beneficial creatures were gone., no more chemicals for me, after seeing the damage they do.