A San Francisco gardener cleared an 8x12 ft area for a first vegetable garden, worries about weeds returning, especially invasive oxalis (6-8" deep bulbs). Asks about Miracle-Gro Weed Preventer, Roundup, and organic alternatives.
The expert advises against herbicides in food gardens. Heavy mulch (3 inches compost or shredded alfalfa) suppresses weeds, conserves moisture, feeds worms, and makes weeds pull easily. For oxalis, mulch makes removal simple. Pull mulch back to plant, then push it back. Website offers more details.
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