Reviving Sod After Early Mowing and Poor Soil Prep

Brown Edges on New Sod: Causes and Fixes

A homeowner laid sod without soil preparation and mowed at the end of week two (instead of week one). The grass looked great initially, but after mowing, brown, hay-like patches appeared, especially at the edges. The sod farm recommended a half-rate, time-release fertilizer, but the homeowner can't find it.

What Went Wrong

• No soil prep: Poor root-to-soil contact limits water and nutrient uptake.
• Early mowing stress: Mowing before roots are established (typically 10–14 days) shocks the grass.
• Edge vulnerability: Edges dry out faster and suffer more from mower scalping.

How to Recover

1. Water deeply and consistently: Apply 1 inch of water every 3–4 days (use a pan under the sprinkler to measure). Deep watering encourages root growth.
2. Fertilize appropriately: Any quality slow-release nitrogen fertilizer (e.g., 20-5-10 or similar) at half the labeled rate will work. Lesco (lesco.com) and local nurseries carry suitable products. Water in after application.
3. Avoid "weed and feed" products: These contain herbicides that can damage new sod.
4. Hold off on mowing: Let the grass reach 3.5–4 inches before the next cut, and never remove more than one-third of the blade height.

Key Takeaway

Consistent deep watering and a light application of slow-release fertilizer will help the sod recover. The brown areas should green up within a few weeks if roots are alive.