hi Cetti - haha!
..... the word oxalis strikes terror into every gardener's heart...some varieties are actually ok but I would always err on the side of caution &, as shaney said, never plant it outside.
It can be a real thug & I've had the tiny red leaved variety with yellow flowers for years. In fact, one of the reasons I had my front garden cleared & gravelled was that stuff! and still it comes back in the small planted area....grrrr.
If you ever spot any in your garden dig it out & burn it, bin it or catapult it into outer space immediately. :o)