Columnar Aspen Root Spread: Safe for Rock Wall Beds

Root Zone of 'Erecta' Aspen

Columnar aspen (~10 ft canopy width) has roots extending ~1.5× canopy width (15 ft). Roots are not aggressive; they don't lift walls or invade pipes like poplars.

Bed Width Guidance

• Bed > 10 ft wide: No conflict.
• Bed < 10 ft: Still unlikely to damage a rock wall; roots follow moisture, not structure.

Ensure good drainage; aspens dislike wet feet. No root barrier needed.