Native or Introduced:
Nutrient Removal Rating:
Medium (in constructed wetlands)
Rooted or Floating:
Full sun to part shade
Maximum Water Depth:
Black willow is a deciduous, woody, semi-aquatic tree that grows to be 15-20 feet tall. This plant grows rapidly. Foliage is dark green and shiny above and light green below.
Black willow is a native of the US and is commonly found along stream banks and in low moist areas.
It is undesirable in constructed wetland systems because the root system can penetrate the clay-liner, creating leaks which could short-circuit treatment system and may result in contamination of groundwater.