Many lawn problems only arise because the lawn is starved of adequate nutrition and hence in poor condition. Regular lawn feeding helps to keep these problems at bay. The three most important nutrients for grass are nitrogen (N), phosphorus (P) and potassium (K). Each of these helps the grass in specific ways:
Nitrogen: promotes sturdy plants and dense growth, reducing competition from weeds
Phosphorus: helps establish and grow strong root systems
Potassium: enhances resistance to disease, drought, wear and tear and cold weather.