Oxalis tetraphylla 'Iron Cross'
Anyone have experience growing this guy? The hardiness ratings for it are all over the map. My wholesale catalog lists it at a z3, while several reviews say it needs to be overwintered indoors even in z5! Then there are the sites that say it is more of a z7/8 plant. Grrrr...
Do you find it to be reliably hardy in z5 or not? Is it truly a non-invasive oxalis? Do you have it in full sun and is that preferable to a shaded site?