Diagnosing a Dead Spot in a Photinia Hedge

Recurring failure of photinias in one section suggests a localized soil or drainage issue, not a "cursed" spot.

Investigation Checklist

1. Drainage test: Dig 12″ hole, fill with water. Should drain in <4 hours.
2. Root inspection: Dig up dead plant; check for rot (brown, mushy, foul smell).
3. Soil test: pH 5.0–6.0 for photinias; check for herbicide residue (bioassay with bean seeds).
4. Pest check: Look for vole tunnels, grubs, or nematodes.

Common Causes

• Photinia leaf spot (Entomosporium) – requires fungicide program.
• Poor drainage in low spot.
• Herbicide carryover from previous use.
• Root competition from nearby trees.

Remediation

Correct drainage, replace soil if toxic, treat disease, and replant with resistant variety (e.g., 'Red Robin').