It’s all about Brooklyn at the Polly Hill Arboretum on Wednesday, Sept. 18. Chris Roddick, senior arborist at the Brooklyn Botanical Garden kicks it off with a talk about pruning techniques and tool maintenance from 1 to 3 p.m. There will be a hands-on demonstration and a chance to practice newly learned pruning prowess. Bring hand pruners if you have them. Cost for this event is $20 or $10 if you’re a member of Polly Hill.

In the evening Rebecca McMackin, director of horticulture for the Brooklyn Bridge Park, discusses the Brooklyn Garden, which was created with ecology in mind. The 85-acre post-industrial waterfront site covers more than a mile along Brooklyn’s East River. The cost for the presentation is $10 or $5 for members.

Call 508-693-9426 or visit for more information.