Data for: Ongoing regeneration of ash and co-occurring species 20 years following invasion by emerald ash borer

Emerald ash borer (Agrilus planipennis Fairmare) is a destructive invasive insect pest of ash trees (Fraxinus spp.) in North America. Monitoring ash regeneration within post-invasion forests is essential to assess ash persistence in North America. We recorded density of overstory ash [> 10 cm diameter at breast height (DBH)], ash recruits (2-10 cm DBH), ash saplings (≥ 45 cm in height; 10 cm DBH.