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Carrotwood Tree Near Foundation: Root Management vs. Removal

A 50-foot carrotwood (Cupaniopsis anacardioides) 6 feet from a slab foundation in San Diego is likely at mature size. Root damage to hardscape (patio, deck) is visible; foundation risk is present but removal may not be necessary.

Assessment

Carrotwood is invasive in Hawaii/Texas; in California it’s ornamental but surface-rooted.
Trimming the canopy does not reduce root growth.
Root pruning can help: cut roots no closer than 3× trunk diameter (6 ft for a 2-ft trunk).

Recommended Action

Hire a certified arborist to air-spade or hand-excavate roots at the 6-ft radius.
Cleanly cut offending roots; install a mechanical root barrier (HDPE or metal, 30″ deep) along the foundation side.
Backfill with native soil; avoid amendment that encourages new roots toward the house.
Monitor for new hardscape lifting; grind down minor lifts instead of re-cutting roots repeatedly.

Removal is a last resort. Root pruning + barrier preserves the tree and protects the foundation if done correctly. Verify no utility lines conflict with the pruning zone.

Landscaping and Design: Olive Tree Regrowth from Roots: Managing Persistent Sprouts; Carrotwood Pale Curled Leaves After Pruning: Stress or Pests?; Eliminating Carrotwood Suckers: Cut-and-Paint Glyphosate Method; Dealing with Tree Roots in the Lawn: Removal and Prevention; Poplar Root Suckers in Lawn: Can You Cut Roots Without Killing the Tree?; Tree Roots Lifting Pavers: Switch to Gravel or Raise Patio; Carrotwood Tree Facts: Addressing Neighbor Concerns; Balsam Fir Roots at the Foundation: Prune Slowly, Not All at Once; Ash Tree Surface Roots: Cover, Don't Cut; West Indies Mahogany Surface Roots Near Sidewalk: Root Barriers Better Than Cutting

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