Diagnosing Patchy Failure in New Pennington Grass in Atlanta

An Atlanta homeowner’s newly cleared backyard grows Pennington seed well initially, then patches disappear after mowing or drought. Soil untested; watering daily then stopped.

Likely Causes

1. Fungal disease: Patches that appear/disappear suggest fungus (e.g., brown patch, pythium). Treat with fungicide and reseed as a test.
2. Soil issue: Phytotoxins, heavy metals, or extreme pH. Submit soil + plant tissue (roots + tops) to county extension.
3. Improper watering: Daily light watering creates shallow roots; stopping causes rapid desiccation. Switch to deep, infrequent watering.

Action Plan

• Get a soil test (UGA Extension).
• Apply fungicide (e.g., azoxystrobin) and reseed a test patch. If it holds, fungus was the issue.
• Water 1 inch weekly in 1–2 deep sessions.
• Mow at 2–3 inches with sharp blade.

Pennington seed is certified and reliable. The problem is environmental or cultural, not the seed.