The Durham Garden Forum meets monthly to enrich members' knowledge and skill. Local experts are invited to speak about topics of interest. Fee: $10 per meeting; free for members. Information: durhamgardenforum@gmail.com. Time: 6:30-8 p.m. Fall/winter schedule: Sept. 20 (Bryce Lane on gardening trends); Oct. 18 (Norm Christensen: Treating Your Garden like an Ecosystem); Nov. 15 (Jesse Turner: Sculpture in the Garden); Dec. 6 (Alex Johnson, Durham City Arborist: How Do Trees Work?)

The Sarah P. Duke Chapter 264 of Ikebana International meets on the fourth Wednesday of each month, from 1-3 p.m.

The Triangle Orchid Society holds its meetings on the first Monday of each month. Each meeting has a special topic and speaker. The meetings are free and open to the public. www.TriangleOrchidSociety.org

All meetings are in the Doris Duke Center.