When I had space left in my postage-stamped size yard for plants, one of the plant sales I would frequent was the one held by, and at, the Merritt College Horticulture Club in Oakland, California, 12500 Campus Dr. Oakland, CA 94619.  This plant sale occurs twice a year--once in the Spring and again in the Fall. You are in luck--this year's Fall 2016 Plant Sale is being held at Merritt College's Landscape Horticulture Department this upcoming weekend, on Saturday, October 1, 2016, 9 am - 3 pm, and again on Sunday, October 2, 2016, 12 pm - 3 pm.  Although there is usually a wide variety of herbs, annual vegetables, perennial edibles, ornamental, succulent and native plants for sale, what drew me to this plant sale years past,were the unusual, hard-to-find permaculture plants (e.g., tree tomatoes, tree collards, etc.) used to create (backyard) food forests.  Most of the plants being sold are grown by the faculty, students, and volunteers of the college's horticultural program so they grow well in Bay Area climates.   

In addition to the plant sale, there is live music, food, and various vendors on Saturday.  Members of Merritt College's Horticulture Program are also on hand to answer plant questions.  This event is free and family friendly.