Willow Tree Encroachment and Property Line Liability

Neighbor planted willow 1 ft from property line. Owner concerned about sewer damage liability and future trunk size.

Willow Facts

• Weeping willow: 30-40 ft tall, 20-30 ft spread at maturity.
• Roots spread ~1.5x canopy width.
• Seek water—problematic for septic systems; modern sealed sewers usually safe unless leaking.
• Too close for good form—will become lopsided if pruned back to line.

Trunk Size & Growth Rate

Mature diameter: 18-30 inches. Rate depends on soil/water. At 1 ft from line, trunk will cross boundary "sooner than later."

Options

1. Best: Neighbor moves tree now (small).
2. Second: Prune your side; trench 12-18" deep on line, fill with sand, re-trench every few years to cut roots.
3. Root barrier on your side (expensive).
4. Nuclear: Fertilize your lawn with Weed & Feed near tree—herbicide kills it. (Don't use near desired trees.)