MONTHLY PLANT CLINIC ... UC Master Gardeners staff a walk-in plant clinic at Gamble Garden, 1431 Waverley St., Palo Alto, from 9 to 11 a.m. on the second Saturday of each month. They will also answer gardening questions every Friday from 1 to 4 p.m. Information: Master Gardeners at 408-282-3105, between 9:30 a.m. and 12:30 p.m., Monday through Friday or http://mastergardeners.org or Palo Alto Gardening Hotline: 650-329-1356, ext. 205
TREE WALK ... An arborist will lead a free tree walk Saturday, Jan. 11, 10 a.m. to noon, around the Lucie Stern Community Center and surrounding neighborhood, meeting at the Children's Library, 1276 Harriet St., Palo Alto. Expect to see a host of tree species, including London plane tree, eastern redbud, Floering dogwood, Australian willow and more. Information: www.canopy.org.
CREEKSIDE PLANTING ... Acterra is sponsoring a workday from 9:30 a.m. to 12:30 p.m. on Saturday, Jan. 11, meeting at the grassy park adjacent to the pumphouse at the intersection of Palo Alto Avenue and Hale Street in Palo Alto. Bring a reusable water bottle and sturdy shoes and long pants to spend a few hours pulling invasive ivy along San Francisquito Creek. Volunteers of all ages welcome. Information: www.acterra.org
UNDER THE OAKS ... Master Gardner Abby Garner will discuss "Gardening Under Oaks and Dry Shade Gardening" from 1 to 2 p.m. on Friday, Jan. 17, at Avenidas, 450 Bryant St., Palo Alto. The free class will cover landscape plants that thrive in dry, shady conditions, such as under native oaks, as well as how to care for majestic oaks. Information: Pre-register at the front desk at Avenidas or call 650-289-5400.
BYO SEWING MACHINE ... FabMo's Bron and Marge will offer a chance for sewers to bring their own machines (and projects) for a SewMo event from 9 a.m. to 1 p.m. on Tuesday, Jan. 14, at 2423 Old Middlefield Way, Mountain View. (Some machines are available for use on site.) Cost is $5. Information: www.fabmo.org
GROW BIOINTENSIVE ... Eric Buteyn, manager of the Ecology Action headquarters farm in Willits, Calif., will teach the "Introduction to Grow Biointensive" class from 10:30 a.m. to 12:30 p.m. on Saturday, Jan. 18, at Common Ground, 559 College Ave., Palo Alto. The class will cover double-digging, carbon and calorie farming, composting, intensive plant spacing, companion planting and using open-pollinated seeds. Cost is $31; the series of nine classes is $218. Information: 650-493-6072 or www.commongroundinpaloalto.org