• Folk Music Jam Session -- Noon-1 p.m. March 9 and 23, 105 Music Building. Campus and community folk musicians are invited to play together during an acoustic jam session, and others are invited to listen.
• Tour -- Noon March 14, Walk with Warren, with arboretum superintendent Warren Roberts. Gazebo, Garrod Drive.
• Tour -- 2 p.m. March 18, "Has Spring Sprung?" Gazebo, Garrod Drive. Free parking on weekends.

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

Besides presenting regular tours, Friends of the UC Davis Arboretum offer the following special events in March. These events are open to the public.

• Spring Plant Sale and Social -- 9 a.m.-1 p.m. March 17, arboretum nursery, Orchard Road near LaRue Road. The sale is limited to members of Friends of the Arboretum, but anyone is invited to join at the gate: $15 for students, $40 for others and $60 for families. Every new member receives a free plant and a 10 percent discount on purchases. Free parking in Lot 35.
• Day trip -- 7:45 a.m.-5 p.m. March 21, San Francisco Flower and Garden Show. $55, or $45 for members of Friends of the Arboretum; includes transportation and admission. Advance registration required; contact the arboretum, (530) 752-4880 or arboretum.ucdavis.edu.