Oxalis! [View all]

I'm in the SF Bay Area. We recently had some rain, and every oxalis root/seed/whatever they grow from has sprouted. I've tried mulching in the past, and only got hardier oxalis. Any tips for getting rid of it, other than digging up every blasted plant? I've found oxalis sprouts under piles of lumber, in pots planted with commercial potting soil, everywhere! Maybe there's a panda equivalent that can feast on it?

It will all be gone when the rains stop in March or April, but until it will leave bare soil behind.