Garden Calendar

* Learn how to stake perennials and train roses in a class by Mary Brosius, today, 1 to 3 p.m., at Descanso Gardens, 1418 Descanso Drive, La Can~ada Flintridge, (818) 952-4401; https://www.descanso.com.

$18; registration required.

* To find out about UCLA Extension’s certified landscape architecture program, visit the open house Saturday, 9 a.m., at the UCLA Extension Building, 10995 La Conte Ave., Room G33, Westwood, (310) 825-9414; https://www.uclaextension.org. Free.

* Learn how to propagate fruit trees from a talk by Rare Fruit Growers’ Julie and Paul Frink, Saturday, 10 a.m., at the Fullerton Arboretum, Associated Road at Yorba Linda Boulevard, Fullerton, (714) 278-3579. $7.

* African violet show and sale, Saturday, noon to 4 p.m., and Sunday, 10 a.m. to 3 p.m., at the South Coast Botanic Garden, 26300 Crenshaw Blvd., Palos Verdes Peninsula, (310) 544-1948. $5.

* The Wisteria Festival celebrates the bloom of a 250-ton, block-covering wisteria vine planted in 1894, with vine viewing March 19, 9 a.m. to 4 p.m., in Sierra Madre. Advance tickets are required, by sending a stamped, self-addressed envelope to Wisteria Tickets, Sierra Madre Chamber of Commerce, 49 S. Baldwin Ave., Suite K, Sierra Madre, CA 91024, (626) 306-1150; https://www.sierramadrevillage.com. Tour tickets are free. There is a one-mile walk, uphill, to the vine. Tickets for a shuttle bus tickets can be purchased for $5 round-trip.