Fraxinus pennsylvanica, or green ash, is not recommended for planting due to its high susceptibility to the emerald ash borer, which has decimated ash populations. This species was once a dominant canopy tree across most municipalities in Ontario. It prefers moist, fertile soils ranging from sandy, to clay loam, with a preference for well-drained conditions. This species, along with the elm, have taught many urban foresters to diversify their canopy.