A two-day orchid extravaganza with orchid displays, orchids in bloom, and regional commercial vendors. Tropical and hardy orchids and orchid-growing supplies and related items for sale. Free informational talks and demos. Info: aaosonline.org. Presented by Ann Arbor Orchid Society. Free.

At http://www.lsa.umich.edu/mbg/happening/calendar.asp?date=3/18/2017:  "This event runs two days and is open 10 am-4:30 pm both days." In the 2017 Matthaei-Nichols Member Guide, the Saturday hours are noon-4:30 pm.

Location: Matthaei Botanical Gardens