Garden Calendar

* Spring Orchid Show, with lectures, vendors and orchids on display, is Saturday, 10 a.m.-3 p.m. at the UC Irvine Arboretum, Campus Drive and Jamboree Road, Irvine, (949) 824-5833. $2.

* Talk on “Planning Your Spring Garden” for flowers and vegetables, is Saturday, 9:30 a.m. at Sherman Gardens, 2647 E. Coast Highway, Corona del Mar, (949) 673-2261. Free.

* The 29th annual Huntington Camellia Show will have thousands of blooms on display plus demonstrations on pruning, grafting and other techniques, noon-4:30 p.m. Saturday and 10 a.m.-4:30 p.m. Sunday at the Huntington Library and Botanical Gardens, 1151 Oxford Road, San Marino, (626) 405-2141, https://www.huntington.org. The show is free; $8.50 admission to visit the gardens.

* See the “World’s Largest Flowering Plant,” a block-smothering wisteria, March 25, 9 a.m.-4 p.m. at the Wisteria Festival in Sierra Madre. Reservations for viewing the vine are required and cost $6 per person. Send checks and the hour you’d prefer to tour, plus a self-addressed stamped envelope, to Sierra Madre Chamber of Commerce, 49 S. Baldwin Ave., Suite K, Sierra Madre, CA 91024, (626) 306-1150.

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Send garden announcements to Garden Events, Los Angeles Times , 202 W. 1st Street, Los Angeles, CA 90012, at least three weeks before the event date.