After several attempts with different, sometimes significantly cheaper lawn fertilizers, use whoever the lawn fertilizer / U now for several years. Although this fertilizer has a fairly high price, it is worth. Since we started using this fertilizer, we have not yet dandelion clover in grass and other weeds are reliably kept away from the lawn. The surface is dark green and the lawn mutated into a soft carpet. ;-)
The only drawback ... The grass grows as it would be paid for it. Who uses this fertilizer should be on two (of effect after use) Set up three times mowing / week. :-)