Planting Emerald Green Arborvitae Near House: Root Risk Low with Maintenance

Question: Plant emerald green arborvitae (15 ft × 4 ft) at house corners. Damage foundation? Other pyramid evergreen options?

Answer: Low Root Risk If Trimmed Annually; Consider Bay Laurel, Osmanthus, Holly Oak

Thuja occidentalis is slow-growing; roots not highly destructive but can enter weak pipes. Trim yearly to keep small—roots stay fibrous. Use thick organic mulch to encourage surface roots.

Alternatives for pyramid shape: Bay laurel, Osmanthus, Holly oak (topiary-friendly). See Italian topiary examples.

—Jonathan Radford | ecologicagardens.com