6-8 p.m. – Dunwoody city arborist Howard Koontz discusses tree biology and soil testing, selecting a proper site, and basic maintenance such as pruning and watering. Open to the public. Dunwoody Nature Center, 5343 Roberts Dr., Dunwoody, 30338. For more details, contact Drew Cutright at 678-382-6815, or via email: drew.cutright@dunwoodyga.gov.