Royal Empress Tree Near Pool: Root Spread and Invasiveness

Planning to plant royal empress tree 20 ft from pool liner in Cape Cod, MA. Concerns: root damage to liner, invasiveness.

Root Spread

Roots extend ~1.5x canopy width. Mature width ~30 ft → roots ~15 ft each side. 20 ft from pool is safe. Roots tend to grow downward, less risk to pipes/liners.

Invasiveness

In yard: fine. Fast growth, seed spread makes it invasive in wild areas (shades out natives). As managed landscape tree, excellent for shade.