Reviving Bermuda and St. Augustine Lawns on the Gulf Coast

Diagnosing the Yellowing

Yellow grass can indicate several issues:

• Tan/brown “blanched” color: Normal winter dormancy after hard freezes.
• True yellow (chlorosis): Iron deficiency, common in sandy soils. Apply a mineral supplement from your garden center.

Winter Dormancy vs. Cold Damage

In the mid‑South, Bermuda goes dormant and turns brown‑tan in winter. St. Augustine is less cold‑hardy and may suffer damage in the northern Gulf region. Both should green up once night temperatures settle in the mid‑50s °F.

Action Plan

1. Wait for green‑up. When active growth resumes, apply a nitrogen fertilizer (e.g., ammonium nitrate) with plenty of water.
2. Weed control: Use a pre‑emergent herbicide every three months (or as label directs) to stop weed seeds from sprouting. Many “weed‑and‑feed” products combine pre‑emergent with fertilizer. For existing broadleaf weeds, spot‑spray with a post‑emergent containing 2,4‑D.
3. Repair dead areas: If St. Augustine has extensive cold damage, consider replanting with newer, cold‑tolerant hybrids developed by the Universities of Florida and Texas.

Ongoing Maintenance

• Mow high and frequently.
• Water deeply once a week (1–3 inches).
• Fertilize in late spring, early fall, and late fall (avoid summer).
• Core aerate annually if soil is compacted.

With good soil, the right grass, and consistent care, your Gulf Coast lawn can recover and thrive.