Round-up Isn't Killing This Weed, What Is It? - Landscaping & Lawn Care - DIY Chatroom Home Improvement Forum

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Old 08-27-2011, 08:14 PM   #1
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round-up isn't killing this weed, what is it?

I put round-up on this weed a week ago, nothing. I'm trying to kill everything so that I can turn around and plant new grass on clean dirt, any ideas what it is?

location is maryland if that helps



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Old 08-27-2011, 09:03 PM   #2
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i am having the same issue. I am using the Pro round up and i am making the mix stronger and it still isnt killing it. All it does is turn it a light green but doesnt kill it. i would love to hear what other people use.


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Old 08-28-2011, 01:26 AM   #3
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It looks a bit like African Violet.

If the plant isn't actively growing or transpiring, Roundup won't work very quickly. If you have had any rain or high heat in the last week, same deal.

Try it again after things dry up after Irene and be patient.
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Old 08-28-2011, 12:10 PM   #4
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Do broadleaf leaf (2d4) work on it? Do most pre-emergents work on it?
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Old 08-28-2011, 01:05 PM   #5
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Heres a link that I think might help you

Sure looks like it anyway

When its all said and done there is usually more said than done
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Old 08-28-2011, 09:17 PM   #6
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I don't think this will help but many years ago, I mixed and sprayed 1 gal. of $100.00 a gallon Roundup--with oil surficant, and sprayed my entire fence row.
Two weeks later, the kill was spotty so I called the county agent. He asked me when I sprayed and since he was local advised me that herbicide should not be applied in drought conditions He said plants concentrate nearly all their effort to extract the deepest moisture available and thus will not take in the herbicide.
Two days after a good rain, which was nearly three weeks later, I resprayed and had almost total kill within a couple of weeks
An expensive lesson for me

Also--I have received conflicting reports about some people purchasing Roundup for a much cheaper price then the $95.00 that I paid this spring.
It is virtually the same chemical that I used 20 years ago because, per instructions, 2 oz. per gallon with surficant will give me total kill for most plants
Many years ago, when I had acerage, I experimented, and documented results with many different herbicides. I came to the conclusion that regardless of what chemical you use--it will cost the same to kill vegitation
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Old 08-30-2011, 08:58 AM   #7
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wild violet control

The weed you have is wild violet. Roundup should control this weed, however there are a few things to consider. 1. If it has been hot and dry, even though still green, weeds go into a dormant stage and will not absorb the product. 2. This is a tough one to kill and may require more than one app. 3. If you can, take a leaf rake and rough over the weed a bit to break up the waxy coating, allowing for more effective application. For more info, visit


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