Garden Calendar

Friday: a tour of John Greenlee’s grass nursery in Pomona, leaving at 9 a.m. from Descanso Gardens, 1418 Descanso Drive, La Canada Flintridge; (818) 952-4401. $25, with reservation required.

Saturday: a children’s garden workshop on cocoa and chocolate, 9-11:30 a.m., at the Huntington Botanical Gardens, 1151 Oxford Road, San Marino; (626) 405-2127. $12, includes admission for accompanying adult. Preregistration required.

Saturday and Sunday: the Los Angeles Rose Society show; 1-4 p.m. Saturday, 9 a.m.-4:30 p.m. Sunday; Descanso Gardens, 1418 Descanso Drive, La Canada Flintridge; (818) 952-4401. $5.

Sunday: a talk and book signing by Heidi Gildemeister, author of “Mediterranean Gardening,” 1-3 p.m., at the Rancho Santa Ana Botanic Garden, 1500 N. College Ave., Claremont; (909) 625-8767. $10, with preregistration required.

Sunday: a talk on fall flower arranging, 2 p.m., at the South Coast Botanic Garden, 26300 Crenshaw Blvd., Palos Verdes Peninsula; (310) 544-1948. $5.

Wednesday: a lecture on California conifers, by Ronald Lanner, to be followed by a signing of his new book, “California’s Conifers: A World of Diversity,” 7-9 p.m., at the Rancho Santa Ana Botanic Garden, 1500 N. College Ave., Claremont; (909) 625-8767. $7, with preregistration required.

Oct. 21: English-trained gardener Chris Woods will talk about Chanticleer gardens in Pennsylvania and the passion of gardening, 2:30 p.m., at the Huntington Botanical Gardens, 1151 Oxford Road, San Marino; (626) 405-2141. $8.50.