A few, but only a few, oxalis species are known to be weedy. Avoid them and you need not worry. I bring this up because one of these species is described in the wiki without any mention of its potential weediness. That species is O. convexula. A delightful plant in flower, it is grown in Northern California, from where I have so far heard no reports of a weedy character. In San Diego, it simply should not be grown. It produces, below the flowerheads, masses of seed, or really bulbils that are excact clones of the plant. Those tiny bulbils spring into life when they fall on the ground. Their small size allows them to be washed around by rain, assisting spreading very quickly. The question I have is 'are there oxalis growers out there who have had problems with O. convexula'? Mary Sue says she has not heard of any in northern California, or elsewhere. But, does it behave as mine does further south, in Los Angeles, for instance? It's important that we know the weedy species and avoid them. There are so many gorgeous species that never cause problems and are more likely to be eaten by rodents, that it would be wrong to label the genus as 'not to be grown'. I'd like the input so that proper guidance is included in the wiki about those we should avoid and in which areas we should avoid them. Thanks Andrew Wilson San Diego