Horticulturist Lili Singer will lecture on "The ABCs of Native Plant Gardening," a class sponsored by Nopalito Native Plant Nursery. 1 p.m. Preregistration is $10; admission at the door is $15. Calvary Christian Fellowship Church, 4221 E. Main St., Ventura. (805) 844-7449; www.nopalitonursery.com
Gardening consultant Marta Teegan leads this workshop on composting at home using a two-bin method or worms. 1 to 2 p.m. $30. All classes are held in a rooftop kitchen garden in downtown L.A. To register, send an e-mail with the name and date of the class to firstname.lastname@example.org
Experts will exhibit and talk about the finest camellias at the Southern California Camellia Society Show. 1 to 4 p.m. today, 9 a.m. to 4 p.m. Sunday. Free with regular admission of $3 to $8. Van de Kamp Hall, Descanso Gardens, 1418 Descanso Drive, La Cañada Flintridge. (818) 949-4200; www.descanso gardens.org
Hundreds of objects donated to the Mingei International Museum but not added to the permanent collection will be sold. Items include furniture, textiles, sculptures, pottery and toys. Prices range from $50 to $2,500. 10 a.m. to 4 p.m. 1439 El Prado in Balboa Park, San Diego. (619) 239-0003, Ext. 133; www.mingei.org/treasures
Christy Wilhelmi of Gardenerd will host a spring planting workshop. Learn tricks for plant placement, healthy soil and the best places to get seed. 1 to 3 p.m. $40. To register: www.gardenerd.com/springclass.html
The winter Thursday Garden Talks With Lili Singer continues with landscape architect Sarah Peterson, who will discuss "Framing Design Through Landscape Ecology." 9:30 a.m. to noon. $20. Los Angeles County Arboretum & Botanic Garden, 301 N. Baldwin Ave., Arcadia. Registration: (626) 821-4623; www.arboretum.org
Artists look at the medium of billboards and their role in the urban landscape in the exhibition "How Many Billboards? Art In Stead." Sponsored by the MAK Center for Art and Architecture, this project will run for five weeks starting Friday and include 21 newly commissioned artworks throughout L.A. Participating artists include Michael Asher, Jennifer Bornstein, Eileen Cowin, Allan Sekula, Susan Silton and James Welling. Watch the project unfold and subscribe for up-to-date information at www.howmanybillboards.org
Create a modern floral design inspired by the traditions of the Chinese New Year. 2:30 p.m. $75 to $85. A similar class for kids 7 to 12 will be held from 1 to 2:30 p.m.; $25 to $30 fee includes one accompanying adult. Huntington Library, Art Collections and Botanical Gardens, 1151 Oxford Road, San Marino. Registration: (626) 405-2128.
Landscape designer Mike Brown of Project Greenscaping shows how to reduce or remove your lawn to meet water restrictions, save money and be environmentally conscious. 9 a.m. to noon. $24 to $30. Descanso Gardens, 1418 Descanso Drive, La Cañada Flintridge. (818) 949-4200; www.descanso gardens.org
"Behold the Day: The Color Block Prints of Frances Gearhart" closes Sunday. Exhibit consists of about 100 works from one of the top color-block printmakers in America in the 1930s. Through her work, the Pasadena artist brought the mountainous Western landscapes to East Coast audiences. $5 to $7. Noon to 5 p.m. daily. Pasadena Museum of California Art, 490 E. Union St. (626) 568-3665; www.pmcaonline.org
"Otto Neurath: Gypsy Urbanism," the first exhibition of works by the early 20th century Austrian designer-philosopher-urbanist in the United States, is closing Sunday at the MAK Center for Art and Architecture. 11 a.m. to 6 p.m. daily. $7. 835 N. Kings Road, West Hollywood. (323) 651-1510; www.mak center.org
-- Lisa Boone Please send listings at least three weeks in advance to email@example.com to the Home section, L.A. Times, 202 W. 1st St., L.A., CA 90012.