On Tue, Feb 14, 2012 at 4:02 PM, Leo A. Martin <leo@possi.org> wrote: > Oxalis pes-caprae isn't invasive here in Phoenix...Now O. corniculata is > another story. Both are a pain in my garden in the central Monterey Bay area of California. I covered a few beds which were infested last year with a heavy mulch and the number of plants of both types that came up this year were minimal. I am still pulling them up as they appear and I see them. The O. pest-crapae is now just developing new bulbs, so I am making extra effort to weed it out over the next few weeks. It appears that if you can remove them between the time they exhaust their original bulb and before they can make new ones you have a good chance of controlling it. Randy