What is this weed?

budfoxSeptember 30, 2013

In the last few weeks this weed has spread all over by tiny backyard. I have river pebble/rocks and no grass and 3 months ago I sprayed for weeds using the high power stuff (Ortho Ground Clear)... which do every fews months since I have nothing but pebbles/rocks.

Then we had a really, really wet summer in Charlotte NC and these plant/weeds have grown everywhere in my backyard.

I tried pulling them today and some were so rooted that I couldn't pull them.

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Tiffany, purpleinopp GardenWeb, Z8b Opp, AL

Looks like mimosa tree.

    Bookmark   September 30, 2013 at 12:27PM
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hortster(6a, southcentral KS)

I'd say more like an acacia.
hortster

    Bookmark   September 30, 2013 at 4:45PM
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budfox

@hortster- yep that's it.

Is that a weed??? Is it normal to have these growing in a backyard (no vegetation, just river rock)?

    Bookmark   October 3, 2013 at 5:42PM
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Kimmsr(4a/5b-MI)

Acacia, a member of the Mimosa family, is often planted where it can help control erosion since it can be a fast growing tree. Some consider it a "weed" while others look for it to put In the landscape.
A "weed" is a plant you do not want growing where you do not want it growing, so this could be a "weed" where it is but a desirable plant in another location in your landscape.

    Bookmark   October 5, 2013 at 8:09AM
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hortster(6a, southcentral KS)

Both are weeds to me. Personally, I have no erosion. My neighbor's mimosa is not a desirable plant because of its seed production which causes it to be a plant that I do not want growing where I do not want it growing, ergo, a plant that produces weeds in my landscape beds. I constantly use glyphosate to eradicate the numerous seedlings. I wouldn't have to use that product nearly as much if it wasn't for the mimosa seedlings. Hand pulling them leaves roots which seem to always return.
hortster

    Bookmark   October 6, 2013 at 8:49PM
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