•FREE•Apeiron Institute for Environmental Living Program: 10 More Things You Can Do to Live a Greener Life: Learn More Ways to Help Preserve and Protect the Earth, University Heights Whole Foods Market, 601 North Main St., Providence. 621-5990. Program on sustainability as it relates to our state. Thu 6-7 pm. Advance registration.

Arnold Arboretum Programs, Arnold Arboretum, 125 Arborway (Route 203), Jamaica Plain, Mass. (617) 524-1718; www.arboretum.harvard.edu. Advance registration.

•Is It Spring Yet? Parents and children take a close look at the Arboretum’s early-blooming plants then sketch a variety of flower forms and search for other signs that a new season has arrived. With Nancy Sabelski, the Arboretum’s manager of children’s education. Next Sun 1:30-3 pm. $10 per family. Hunnewell Building.

•Private Spaces: Garden Redesign for Homeowners. Learn how to design you personal space for maximum use and style and how to deal with issues of sun, shade, drainage and water in an urban or suburban environment. With Peter Medaglia, landscape designer and owner of Gold Medal Gardens. April 10, 17, 24, 6:30-8:30 pm. $86, members $72. Hunnewell Building.

•Pruning Basics for Woody Ornamentals, Dana Greenhouses, 1050 Centre St., Jamaica Plain. Jen Kettell, a horticultural technician at Arnold Arboretum, demonstrates pruning tools and methods for maintaining well-balanced specimens and teaches the basic techniques of structural pruning to enhance beauty of ornamental shrubs. Sat 9 am-noon. $35, members $30.

•Selecting Plants for Home Landscapes. Brian Karlsson-Barnes, landscape designer at Weston Nurseries, helps participants evaluate their site conditions in order to select the most appropriate plants. April 11, 18, 25, 6:30-8:30 pm. $90, members $75. Hunnewell Building.

Frerichs Farm and Greenhouses Open House, 43 Kinnicutt Ave., Warren. 245-8245. Sat-next Sun 9 am-5 pm. Percentage of sales to benefit the Autism Project of Rhode Island.

Hockomock Antiques Show, West Bridgewater High School, Route 106, West Bridgewater, Mass. (508) 697-5869, (508) 378-7388. 50 selected exhibitors. Sat-next Sun 11 am-4 pm. $5. Early buyers preview, $10.

•FREE•Ocean State Orchid Society Orchid Auction, East Greenwich Veteran Firemen’s Assocition, 80 Queen St., East Greenwich. www.oceanstateorchidsociety.org. Sat. Bidder registration/plant preview 10-11 am; auction begins 11 am.

South Kingstown Parks and Recreation Programs. 789-9301. Advance registration.

•Sat. Path and Patio Workshop, Tri-Pond Park Nature Center, Asapond Road (off Curtis Corner Road), South Kingstown. With staff from Wood River Evergreens. Participants learn the best techniques to use to construct their own path or patio. During the hands-on portion, participants will work with pavers to construct a walkway. Bring plenty of water, dress in comfortable clothing and shoes, bring pair of tough gloves. 1:30-4:30 pm. Rain date April 21. $30, South Kingstown residents $25.

•April 14, 21. Nature Wet and Wild – Water Gardens. 789-9301. 1-3 pm. Part 1, April 14, at Tri-Pond Park Nature Center, Asapond Road (off Curtis Corner Road), South Kingstown. Part 2, April 21 at Piece of Paradise, Fish Ponds and Water Gardens, 206 Nooseneck Hill Rd., Exeter. An introduction to the natural history of backyard water gardens. Biologist Marilyn Massaro introduces participants to the intricate relationships between plants and animals and how they relate to the aquatic environment.

•FREE•Southside Community Land Trust “Plant Food” Workshop, Smith Hill Library, 31 Candace St., Providence. 455-8104. Participants introduced to the basics of creating and tending an urban organic garden. Topics include garden planting, seed starting, lead testing, composting and soil health, working with children in the garden and more. Wed 6-7:30 pm. Additional workshops, other dates, other locations.

University of Rhode Island’s Master Composter and Recycler Training Program, Roger Williams Park Botanical Center, Elmwood Avenue, Providence. 874-2900 or e-mail ceed@etal.uri.edu. Five-week program geared toward local residents, municipal public works staff, conservation commissioners and others who are interested in becoming experts at composting and recycling. Weekly, two-hour sessions begin Mon, April 9, at 6 pm, and include such topics as the importance and benefits of composting and recycling, starting a backyard compost process, compost science, worm and innovative composting methods and community outreach. Two additional sessions scheduled to visit the state landfill in Johnston and Earth Care Farm, a commercial composting facility in Charlestown. Class also will tour the Southside Community Land Trust’s City Farm. $50.