Folk Music Jams — Play or listen. Noon May 14 and 28. Wyatt Deck.

Plant sale — End of Season Clearance, 9 a.m.-1 p.m. May 15, Arboretum Teaching Nursery, Garrod Drive south of La Rue Road.

Tour — Oak Ecology and Diversity. 2 p.m. May 16, gazebo.

Bicycle tour — What’s New at the Arboretum? Bring your bicycle for an easy, slow ride lasting about an hour and covering less than five miles. 11 a.m. May 22, Buehler Alumni and Visitors Center.

All events are free and open to the public. More information, including directions: (530) 752-4880 or arboretum.ucdavis.edu