Lawn Care on Rocky, Shale-Derived Soil in North Carolina

A Cabarrus County, NC homeowner with quartz-studded, shale-derived soil (former gold mine area) asked about Ironite, lime, and fertilizer strategy after a soil test showed "deficient in everything."

Key Recommendations

• Ironite is reformulated—safe to use for iron/sulfur, but it lowers pH. Target pH 6.5.
• Test pH first; lime to 6.5 if low, or use Ironite if high.
• Fertilizer ratio: ~7-1-1 (e.g., 28-4-4).
• Schedule by grass type:
  • Fescue: spring & fall only.
  • Bermuda: monthly April–Oct.
  • Zoysia: bi-monthly April–Oct.
• Core aerate annually to relieve compaction and improve rooting.

Local knowledge (the expert grew up nearby) confirms the unique geology; focus on pH, aeration, and grass-type-specific feeding.