Fast-Growing Tree in Yard: Paulownia (Empress Tree)

A user has a tree that appeared 3 years ago, now reaching the house top. Leaves turn yellow in winter, stems and leaves fall off. Sticky feel, growing at base of washer drain runoff (hot/cold water, bleach).

Expert Answer: The tree is Paulownia (empress tree). Makes large tree with purple flower clusters. Nice but short-lived (10-15 years), can exceed 30 feet. Known as "world's fastest growing tree" in ads.