Why is my grass dying?


Quick Answer

Pest infestations, chemical spills and environmental stress, such as using too much fertilizer, are common reasons that grass dies. Environmental stress can also promote diseases that kill grass.

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Full Answer

Grass that receives too much or too little water may become prone to diseases caused by fungi and other grasses. Other types of environmental stress includes unseasonable weather, such as very cool summers, and applying too much fertilizer to the lawn. Water grass only when the weather is sunny and hot, and limit fertilizer to areas that appear damaged or dying. Adjusting the mower blade before mowing hills and slopes prevents grass from dying as a result of being cut too short.

Pet urine, gasoline, paint thinner and other chemicals can cause grass to die in the affected area. If a contaminant has caused damage to the lawn, flush the area with water, then sow grass seed in the affected area. Pet urine damage should be treated by training the pet to visit a hidden area of the lawn.

Widespread grass damage can be caused by pests, such as grubs or armyworms, that burrow into the soil and destroy root systems. Identify the pests, then choose a pesticide or deterrent designed to eliminate the specific insects causing the problem. In some cases, allowing the lawn to dry out eliminates a significant number of pests, and the grass can be revived in autumn.

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