The best fertilizer for grass, overall, is Milorganite Slow Release Nitrogen Lawn Fertilizer. This grass fertilizer is wonderful for promoting healthy grass, trees, shrubs, and flowers.

One of the most important nutrients for lawns is iron, which plays a crucial role in photosynthesis. A lack of iron can cause yellowing leaves, stunted growth, and overall poor lawn quality. The good news is that liquid iron supplements can provide a quick and effective solution to this problem.