Garden calendar | A listing of garden events, classes and sales.

Dahlias and dessert

THU Enjoy dessert while learning about types of dahlias, planting tips, dividing and storing tubers. 6:30-8 p.m., GriefWorks 715 30th St. N.E., Auburn; $20 donation (253-333-9420 or www.griefworks.org).

The charm of roses

SAT How to grow beautiful, fragrant roses organically,

11 a.m., City People's Garden Store, 2939 E. Madison, Seattle; free (206-324-0737 or www.citypeoples.com/gardenstore).

Warm-weather veggies

SAT Tips on growing, preparing and eating these vegetables,

5 p.m., Swanson's Nursery, 9701 15th Ave. N.W., Seattle; free (206-782-2543 or www.swansonsnursery.com).

Plants you love to hate

SUN or WED Learn about common landscape problem plants, how to control them and alternative planting choices; preregistration required, 11 a.m. Sunday or 1 p.m. Wednesday, Emery Garden, 2829 164th St. S.W., Lynnwood; free (425-743-4555 or www.emerysgarden.com).

Master Gardener Foundation plant sale

SAT-SUN Plants propagated from Master Gardeners' own gardens, plus vendors from specialty nurseries. 8 a.m.-5 p.m. Saturday, 10 a.m.-3 p.m. Sunday, Center for Urban Horticulture, 3501 N.E. 41st St., Seattle; (253-838-4713 or www.mgfkc.org).

Seattle Tilth plant sale

SAT-SUN Selection of organic heirloom and rare vegetable starts. 9 a.m.-3 p.m. Saturday, 11 a.m.-3 p.m. Sunday, Meridian Playground, 4649 Sunnyside Ave. N., Seattle; (206-633-0451 or www.seattletilth.org).