Over-Fertilization: The Hidden Cause of Yellow Patches

When Too Much Fertilizer Burns Your Lawn

Applying a second round of fertilizer two weeks after the first—especially if both are high-nitrogen "green-up" products—can overload the soil with salts, burning roots and causing yellow, stunted patches.

Diagnosis and Remedy

• Confirm over-fertilization: Symptoms appear quickly after application: yellowing, halted growth, sometimes crusty soil surface.
• Leach excess salts: Water heavily and repeatedly (daily for several days) to flush nutrients below the root zone.
• Avoid further fertilizer: Do not apply more until the lawn recovers and a soil test confirms need.

Prevention

Follow a schedule: late spring, early fall, late fall. Skip summer applications. Use slow-release formulations and always water in thoroughly.

Moderation is key—more fertilizer is not better.