Garden Calendar

* Saturday, “Ferns for the Home Garden,” by fern specialist Herb Wilkinson, 9:30 a.m., Sherman Gardens, 2647 E. Coast Highway, Corona del Mar, (949) 673-2261. Free.

* Saturday, workshop on worm composting, 10 a.m., at Fullerton Arboretum, Associated Road at Yorba Linda Boulevard, Fullerton, (714) 278-3579. $7.

* Saturday and Sunday, native plant sale featuring thousands of native California plants, 11 a.m.-4 p.m. Saturday and 9 a.m.-1 p.m. Sunday, at Rancho Santa Ana Botanic Garden, 1500 N. College Ave., Claremont, (909) 625-8767. Free admission.

* Saturday and Sunday, fall orchid festival with displays, sales and lectures, 10 a.m.-3 p.m., at the UC Irvine Arboretum, Campus Drive and Jamboree Road, Irvine, (949) 824-5833. $2 admission.

* Saturday and Sunday, chrysanthemum show and sale, 9 a.m.-4 p.m., South Coast Botanic Garden, 26300 Crenshaw Blvd., Palos Verdes Peninsula, (310) 544-1948. $5 admission.

* Nov. 11, “Cones, Corkscrews and Cryptics,” a talk on South African flora, 2:30 p.m, followed by a plant sale, at Huntington Botanical Gardens, 1151 Oxford Road, San Marino, (626) 405-2141. $8.50 admission.