causes of yellow lawn
Causes of a Yellow Lawn. When a lawn turns yellow, there are several factors that may be to blame, including bacterial and fungal diseases, pests, nutrient deficiencies, and a pH imbalance. To successfully treat this common lawn problem, it's important to first determine the underlying cause of the discoloration. Causes of a Yellow Lawn.
Iron Deficiency. If the leaf blades of your lawn turn yellow at the top of the leaf, your lawn may have an iron deficiency. Mowing at too low a level can cause this problem. The roots of a scalped lawn cannot provide enough iron to the rapidly growing leaves. Don't confuse an iron deficiency problem with a nitrogen deficiency problem.