Tree defects such as co-dominant leaders, girding roots and buried trunk flares, present at time of planting, cause failures and decline long after the warrantee period has expired.  Landscape architects may go to nurseries to tag trees; but often inspect only aesthetic qualities, while their planting specifications rely on ANSI Z60.1 for technical standards.  But the ANSI standard is guidance for industry definitions and measurements with few conditions about tree quality.  This webinar presented by James Urban, FASLA and Paul Josey, ASLA, introduced evidence-based specifications to set technical standards that support inspections and will guide landscape architects and arborists in inspecting the technical quality of B&B and container trees as well as discuss common problems and solutions above and below the ground line.