Flipping oxalis!

I only have it (luckily ) in containers in greenhouse, and I have pretty much eradicated it by pulling up whenever it appears - I find I can pull it out by the roots OK-ish, so I figure that I have weakened it over a year or two by that method.

So basically the old adage "Never let it see a Sunday"

A Glyphosate based weedkiller should do the job. It will kill anything green that it touches, so keep it (and any spray drift) off plants you want to keep. It is neutralised on contact with the soil, so no residual effect to worry about for crops that are planted later, or children eating things etc. (It is relatively non toxic to Humans, so even an accident with the concentrate is unlikely to be very serious - although obviously treat any such accident with proper seriousness. I'm only mentioning Toxicity for completeness, not as any sort of encouragement to be slapdash )

Glyphosate needs at least 6 hours dry after application, so watch out for forecast rain, and it will take to weeks to reach the roots and then properly get to work, so you won't notice an overnight kill (although you can use Resolva which also contains additional herbicides that will have that effect, which helps to "see where you have been"). It also needs to be applied when plants are actively growing - so at this time of year "sooner rather than later" would be better.

Up to you to decide if you are happy to have Glyphosate used near your food crops. It has been extremely widely used in agriculture since the 70's, so in theory we should know about any significant side effects by now ... but many here grow veg for the certainty that the food has not been contaminated with anything ...

That's brilliant, thanks Kristen :-) I'll get some weedkiller, just want the blimmin stuff gone!

That's easy: pour boiling water on it

I have it in abundance on the allotment this year, it's a PiTA, and does need digging out as the roots and nodules are a few cm below the surface

Thanks Two Sheds. Do you mean the weedkiller won't work?

No, I mean that I prefer not to use poison if I can help it.

I'd put salt on them on the path and boiling water on the rest.
It's much more accurate and less dangerous to wildlife...and near enough as free!

I hate using weedkillers, but if all else failed I'd also use Glyphosate as an absolutely last resort.

Actually , when I saw you piccies my fist thoughts were how pretty it is!!

Can you really not live with it??

I have it everywhere in my garden, I just leave it as groundcover unless I want to plant something, then I pull some out. It has the prettiest flowers.

I saw two kinds of oxalis weeds in my Dad's garden in Suffolk when I was visiting. One kind has little bulbs and the other has a wiry taproot. The bulby one was much easier to pull up. Which kind is yours Indigo?

In my garden I only have the wiry rooted one. It has yellow flowers, and the leaves turn purple in sunny places. There wasn't a lot of it last year, and only in one part of my garden, and I made the mistake of thinking it was pretty and harmless so I left it alone.

Now I'm regretting that because it has multiplied, and is appearing in other parts of the garden. The seed pods explode and scatter the seeds, and I'm probably carrying them on my feet and tools as well. It's nasty because it invades clumps of other low growing plants and chokes them out. And it's perennial and very tough and will grow in sun or shade.

I've found I can get rid of it quite well from beds if I have the time and patience to dig out the roots thoroughly with a hand fork. But of course that doesn't work for the plants growing in crevices.