Weed with yellow flowers and clover-like petals.

ash_of_the_darkNovember 25, 2010

Hi all, and Happy Thanksgiving!! :)

This weed grows alllll around our property, and has invaded our vegetable gardens, greenhouses, and flower beds. I'm trying to find the best and least toxic way to eradicate it from our garden areas, but I can't do a proper search without the proper name. :( Internet searches have suggested the possibility of 'melilotus oficinalis', and 'oxinalis', but it just doesn't seem to be either one of those.

Anybody know what it really is? And better yet, if you know of any methods to deal with this little guy? It grows super fast, and is difficult to weed, as it has very long, easily-snapped taproots, with relatively large, round seeds attached to their tips (resembling miniature brown bulbs).

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saltcedar(Sunset zn 30/usda 8b)

Oxalis pes-caprae?

Here is a link that might be useful: Buttercup oxalis

    Bookmark   November 25, 2010 at 3:28PM
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Definitely is. A widespread weed problem over here and difficult to eradicate, but possible. Smothering is a good option. No plant can live without light. Cardboard is ideal or thick layers of newspaper, then mulch over the top.

Another option is to spray. Ideally you wait until it is in full growth spurt then hit it with the spray.

The main thing is to be vigilant because those little bulbs can lie dormant for a long time. It you see new growth, deal with it straight away. Good luck!

    Bookmark   November 25, 2010 at 4:25PM
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Wow! Thank you so much! You totally nailed it. And thank you for posting that photo. We were so confused about the little spots on the leaves, thinking it was some kind of fungus or disease, but it looks to be normal for this species. Seems like there's just a bizillion little bulbs all through the soil here. So, vigilant I shall be, and we'll probably shade and mulch the important areas. Thanks again for your help!

    Bookmark   November 25, 2010 at 6:30PM
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vetivert8(NI-NZ zone 9a)

FWIW - when the Oxalis goes into dormancy all the little bulbils that either sit near the surface, or form as beads along a root become 'independent' and need very little encouragement to start life on their own account.

If you are weeding out a patch - go to it when the plant is in full growth. At that time it produces a 'glassy' sort of root and the new bulbils are soft, white and unformed. Very easy to remove with low hazard of reinfesting.

Smothering might work. They'll come up from inches below mulches, though.

And - once is never enough. Stay on it and don't let them flower. Mowing can certainly reduce their reproductive appetite, though not eradicate.

Good luck.

    Bookmark   November 25, 2010 at 8:10PM
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Thank you Vetivert8. That's exactly what I'm doing right now. The acre of land we're on was all dirt, except for the areas we had 'carved' out for gardening purposes (fruits, veggies, berries, flowers). When the rain hit - bam, there they all were. The entire property covered in it. We've been weeding like crazy, and will continue to do so. It'll be so much more worth it! :)

    Bookmark   November 26, 2010 at 8:16PM
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Tis edible.

    Bookmark   November 28, 2010 at 7:45AM
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you can always eat it, if you're really sur it's oxalis, although if it turns out to be some kind of clover, that's edible too.
it's got a nice lemony flavor and is a good addition to salads
I like to add a few sprigs when i'm flavoring pickles.

It tends to be thought of as a childrens food because it's hard to misidentify and safe for kids to eat as they're playing. Even the Native Americans thought of it this way.

    Bookmark   May 7, 2013 at 9:47AM
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