Free plant identifications: The A.C. Moore Herbarium at the University of South Carolina provides free plant identifications. Bring your unknown plant by Coker Life Sciences. (803) 777-8196
Dollar Sundays, Robert Mills House and Gardens: Take a tour of historic house museums 1-5 p.m. Sunday. Purchase tickets at the Museum Shop, 1616 Blanding St. (803) 252-1770, ext. 24, or email aposner@historiccolumbia .org.
W. Gordon Belser Arboretum: Monthly open house will be held 1-4 p.m. Sunday except December, which is the second Sunday, 4080 Bloomwood Road. (803) 777-3934
Plant and Flower Festival: The S.C. Department of Agriculture hosts the festival today-Sunday from 8 a.m.-6 p.m. at the South Carolina State Farmers Market, 3483 Charleston Highway, West Columbia. Patricia Moore-Pastides hosts a cooking demonstration Friday from 11 a.m.-1 p.m. in the Corbett Building. http://agriculture.sc.gov
Party for the Planet: Riverbanks Zoo and Garden hosts this fun-filled celebration in honor of Earth Day from 9 a.m.-3 p.m. Saturday. All Earth Day activities are free with paid admission. (803) 779-8717; www.riverbanks.org
Organic Gardening: Dale Miller hosts a workshop on growing plants organically at 10 a.m. Saturday at Wingard’s Nursery, 1403 North Lake Drive, Lexington. Free. (803) 359-9091; wingardsnursery.com
English Garden Trough: Hypertufa troughs are made from a lightweight, porous material that provides great drainage for plants like herbs and succulents. Participants will make their own trough and see a variety of ways to plant and use them in the garden, 10-11:30 a.m. Saturday, Riverbanks Botanical Garden, 1300 Botanical Parkway, West Columbia. Containers will be ready to pick up by Tuesday. $25 per person. Sign up at riverbanks.org.
2013 Home Builders Association Tour of Homes: Columbia’s largest open house of new homes for sale continues from 11 a.m.-6 p.m. Saturday and April 27 and 1-6 p.m. Sunday and April 28. The five featured communities include Cobblestone Park, Lake Carolina, Lexington Villas, Saluda River Club and Springhill Lake. www.columbiabuilders.com
Iris Flower Show: View locally grown irises, floral arrangements and educational display with gardeners on-hand. Irises and other plants will be for sale, Saturday from 1-4 p.m. at the Garden Club Council Building, 1605 Park Circle. Free
Gardening with Children: The Richland County Master Gardeners host fun activities to teach children how to grow their own flowers and vegetables at 3 p.m. Saturday at the Richland Library, Southeast branch, 7421 Garners Ferry Road. (803) 776-0855
Centipede Lawns: It’s all in the timing. Lexington County Master Gardener John Windham teaches a few simple steps to care for centipede grass, 6:30-7:30 p.m. Monday, main branch, Lexington County Library, 5440 Augusta Road, Lexington. Free. Reservations not necessary. (803) 785-2600
Pine and Lake Garden Club Tour of Hartsville: Take a tour of gardens in the Prestwood Lake area April 27 from 10 a.m.-3 p.m. Tickets are $10, and proceeds benefit the Boys and Girl’s Club of Hartsville. (843) 858-4370
Earlewood Plant Sale: Check out a variety of plants that aren’t easily found in garden centers such as Red Hyacinth Bean Climbers and Moon Flowers from 8 a.m.-noon May 4, Earlewood Park, 1113 Parkside Drive. www.earlewood.org
Seventh annual Aiken Garden Show: Explore several gardens and enjoy the beauty of an all-arrangements American Rose Society Show, May 17-18, Aiken County Historical Museum. Show features a speaker series, food by Banksia Bistro, vendors and dueling designers who face off creating containers and floral arrangements. Tickets are $23 in advance or $25 at the door and are good for two-day admission and off-site gardens and events at the museum. (803) 641-6777 or aikengardenshow.org
Adaptive Gardening: Learn some techniques and tips by Richland County Master Gardeners Amelia Coty and Linda Olson, 6:30-7:30 p.m. May 20, main branch, Lexington County Library, 5440 Augusta Road, Lexington. Free. Reservations not necessary. (803) 785-2600
Lexington County Master Gardeners 12th Annual Garden Tour: Lexington County Master Gardener Volunteers 12th annual tour is May 30, 9 a.m.-4 p.m. and June 1, 9 a.m.-4 p.m. Tour proceeds go to the Sam Cheatham Scholarship for Lexington County horticulture students. Details: www.scmmga.org