Diagnosing Yellowing in Bermuda Hybrid Lawn After Heavy Rain

A North Texas Bermuda hybrid lawn turned yellowish after 3 inches of rain over 3 days in mid-August, despite regular watering and fertilization. Some areas recovered after fertilizing, but yellow patches persist.

Likely Cause: Disease from Excess Moisture

Bermuda grass thrives in drier conditions and is susceptible to fungal diseases when overwatered. The heavy rainfall likely created ideal conditions for pathogen development, especially in areas with poor drainage or air circulation.

Recommended Approach

Monitor the situation for 1-2 months as seasonal changes alter disease pressure. Bermuda often "grows out" of fungal issues as conditions become less favorable for pathogens. Avoid additional fertilization or fungicide applications unless the problem worsens significantly.

When to Seek Further Help

If yellowing persists or expands after 4-6 weeks, consider submitting samples to a local extension service for precise diagnosis. In the meantime, ensure proper drainage and avoid supplemental irrigation during wet periods.

—C.J. Brown, TheLawnCoach.com