Cedar Trees and Hardwood Decline: Separating Myth from Reality

Are Cedars Killing Your Oaks and Hickories?

A North Carolina landowner with a 5-acre lot (zone 7) has a 2:1 to 3:1 ratio of eastern red cedar (Juniperus virginiana) to hardwoods. Over 25% of oaks and hickories are dead or dying across multiple years, not just the recent drought.

Cedar-Apple Rust ≠ Hardwood Decline

Cedar-apple rust requires both cedar and apple/pear hosts. It does not affect oaks, hickories, or other hardwoods. The cedars are not the direct cause.

Real Culprit: Site Conditions

Cedars thrive on:

• Shallow, rocky soils
• Low fertility
• Drought-prone sites

These same conditions stress hardwoods. The cedars are simply better adapted to the site – they're indicators, not aggressors.

Recommended Action Plan

1. Contact NC Forest Service – free forester site visit to diagnose hardwood decline
2. Soil test – check pH, nutrients, depth to bedrock
3. Assess stand density – overcrowding may be a factor
4. Consider selective cedar removal only if:

• Creating space for hardwood regeneration
• Reducing fire hazard near structures
• Improving aesthetics/access

What a Forester Will Evaluate

• Root diseases (Armillaria, Phytophthora)
• Insect pests (oak borers, hickory bark beetle)
• Soil compaction / erosion
• Historical land use impacts
• Species-site mismatch

Bottom Line

Don't cut cedars hoping to save hardwoods without a professional diagnosis. The site likely favors cedars; hardwoods may be on borrowed time regardless.