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Acacia Grove in Bloom — Brilliant yellow blooms and honeylike fragrance. 2 p.m. Saturday, Feb. 26, arboretum headquarters.

Folk Music Jam Sessions — Pull out your fiddles, guitars, mandolins, penny whistles, pipes, flutes, squeezeboxes — you name it! — and join your fellow musicians during the lunch hour for a little bluegrass, old-time, blues, Celtic, klezmer and other world music. All skill levels welcome. Listeners, too! Noon Fridays, March 4 and 18, Wyatt Deck..

Plant sale preview — See examples of garden plants that will be available a week later at the first plant sale of the spring season. Preview, 2 p.m. Saturday, March 5, Arboretum Teaching Nursery.

Storytime Through the Seasons: Expedition to Africa — African stories and nature will be highlighted in this reading program for all ages. 2-4 p.m. Sunday, March 6, Acacia Grove (meeting place: arboretum headquarters). In the event of rain, the program will move to 146 Environmental Horticulture.

Walk with Warren — Tour the collection with master plantsman Warren Roberts, the retired arboretum superintendent. Noon Wednesday, March 9, arboretum headquarters.

Plant sale, members only — Celebrating the 40th anniversary of the Friends of the �ٺ���Ƶ Arboretum, which run the arboretum plant sales. The first sale of the spring season is always for members only — and they receive a 10 percent discount on purchases. Nonmembers are welcome to join at the gate, and thus receive the member discount as well as a free plant. The spring selection will include Arboretum All-Stars and other great plants for Central Valley gardens. With music, refreshments and children’s activities, and free, expert gardening advice. 9 a.m.-1 p.m. Saturday, March 12, Arboretum Teaching Nursery.

Spring in the Native Plant Garden — Learn about local native plants and see the native plant collection in full bloom. 2 p.m. Saturday, March 19, Buehler Alumni and Visitors Center.

Plant sale preview — See garden plants that will be available at spring plant sales April 2 and 30, and May 14. Preview, 2 p.m. Saturday, March 26, Arboretum Teaching Nursery

Spring in the Storer Garden — Gorgeous spring bloom in this demonstration garden of drought-tolerant, low-maintenance perennials and flowering shrubs. Many of these plants will be for sale at the spring plant sales. 11 a.m. Sunday, March 27, gazebo.

All programs are free and open to the public; plant sale admission is free, except for the members-only sale. More information: (530) 752-4880 or (for directions, click on “Plan Your Visit”).