The Morton Arboretum in Lisle, Illinois, provides a weekly Plant Health Care Report, offering valuable insights for gardeners and landscape professionals in the Chicago area. This report focuses on understanding how weather impacts plant and insect lifecycles, enabling effective pest and disease management. By tracking growing degree days, which measure accumulated warmth, the report indicates when specific plants will flower and pests like pine sawfly larvae will emerge. This allows gardeners to time their interventions accurately, avoiding pesticide misuse and minimizing environmental damage.