Plant Taxonomy. 10 a.m. Saturday. Zilker Docents present a program on plant identification. Zilker Botanical Garden, 2220 Barton Springs Road. Garden admission: $1-$3. 512-970-3405.
“Protecting Citrus Plants in Winter.” 10 to 11 a.m. Saturday. Learn about growing food plants in a frost-prone region. Free. The Herff Farm, 33 Herff Road, Boerne. Free. www.cibolo.org.
Plant clinic. 1 to 4 p.m. Saturday. Advice on growing plants in Central Texas, hosted by Travis County Master Gardeners. Zilker Botanical Garden. 512-477-8672, ext. 14, www.zilkergarden.org.
“Grow Locally, Cook Globally.” Noon to 4 p.m. Sunday. The Green Corn Project’s 15th annual fall festival featuring food from local restaurants, live music, cooking demonstrations and a silent auction. Boggy Creek Farm, 3414 Lyons Road. $35 in advance or $40. www.greencornproject.org.
“Jazzing Up the Garden With Color, Contrast and Movement.” 2 p.m. Sunday. Diana Kirby teaches about color, texture and repetition in garden design. It’s About Thyme Garden Center, 11726 Manchaca Road. Free. 512-280-1192, www.itsaboutthyme.com/etiswen/calendar.
“Goblins in the Garden.” 4 to 7 p.m. Sunday. A family festival for children in nature-themed costumes, a pumpkin patch, trick-or-treating and other activities. Lady Bird Johnson Wildflower Center, 4801 La Crosse Ave. $3-$9. 512-232-0100, www.wildflower.org/goblins.
Austin Butterfly Forum monthly meeting. 7 p.m. Monday. Geyata Ajilvsgi discusses “Butterfly Gardening for Texas.” Zilker Botanical Garden. Free. www.austinbutterflies.org.
“Gardening Smart in Texas.” 1:30 p.m. Tuesday. A Highland Lakes Master Gardener Association Green Thumb program. Marble Falls Library, 101 Main St., Marble Falls. Free. 512-388-8849, www.yantislakesidegardens.com/events.
“How to Lose the Lawn: Essential Design Tips and Alternative Plants.” 2 p.m. Nov. 3. Pam Penick gives a presentation and signs “Lawn Gone.” Free. It’s About Thyme Garden Center.
“Trees and their Benefits to Wildlife.” 9 to 11 a.m. and 5:30 to 7:30 p.m. Nov. 4. Betty Dunn leads a tour, teaching which native trees to include in a landscape to attract and nourish wildlife. Cibolo Nature Center and Farm, 140 City Park Road, Boerne. Free. www.cibolo.org.