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Old 04-23-2013, 12:26 AM   #1
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Killing wild grass in mulched flower beds


What chemical can I use to kill those pesky sprouts of wild grass that pop up in my mulched flower beds? I tried Grass B Gone but was not impressed. My latest idea is to pull up each grass sprout, root and all then treat the bed with Preen.

Your thoughts please.

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Old 04-23-2013, 02:16 AM   #2
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Killing wild grass in mulched flower beds


Round-Up with a nozzle you can control will do the trick as a non-selective, systemic, post-emergent herbicide. It may take you as long to spray carefully as pulling them. And you will have to look at dead grass shoots until they break down and decompose.

A pre-emergent like Preen is going to be your best defense long term. You want to apply it to the soil, not to the mulch though. So you will have to rake the mulch out of the way, apply the herbicide, then rake the mulch back in place.

Next year, you might think about a heavy landscape cloth under the mulch although I never specified it as it broke down and then became more of a problem than a solution.

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Old 04-24-2013, 01:03 AM   #3
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Killing wild grass in mulched flower beds


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What chemical can I use to kill those pesky sprouts of wild grass that pop up in my mulched flower beds? I tried Grass B Gone but was not impressed. My latest idea is to pull up each grass sprout, root and all then treat the bed with Preen.

Your thoughts please.
How long did you wait, after applying the Grass-B-Gone, before you were convinced that it didn't work? Some herbicides take a few weeks, as it needs to translocate through the plant.
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Old 04-24-2013, 08:37 AM   #4
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Killing wild grass in mulched flower beds


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How long did you wait, after applying the Grass-B-Gone, before you were convinced that it didn't work? Some herbicides take a few weeks, as it needs to translocate through the plant.
Learned I did not wait long enough.
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Old 04-24-2013, 08:40 AM   #5
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Killing wild grass in mulched flower beds


If your trying to use hardwood mulch, I've found that as it decomposes it just makes a great soil for growing weeds.
I've switched to Cypruss and added the Preen or Preen like product in the mulch and some on top and have no more weeds.
It also does no mold up, rot, or mat down like hardwood does.
It also repels most insects.
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Old 04-24-2013, 08:48 AM   #6
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Killing wild grass in mulched flower beds


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Originally Posted by sore thumb View Post
What chemical can I use to kill those pesky sprouts of wild grass that pop up in my mulched flower beds? I tried Grass B Gone but was not impressed. My latest idea is to pull up each grass sprout, root and all then treat the bed with Preen.

Your thoughts please.
Preen.
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Old 04-24-2013, 11:28 AM   #7
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Killing wild grass in mulched flower beds


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If your trying to use hardwood mulch, I've found that as it decomposes it just makes a great soil for growing weeds.
I've switched to Cypruss and added the Preen or Preen like product in the mulch and some on top and have no more weeds.
It also does no mold up, rot, or mat down like hardwood does.
It also repels most insects.
We are using shredded pine mulch. It, like cypress, does not break down quickly.
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Old 04-24-2013, 12:57 PM   #8
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Killing wild grass in mulched flower beds


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We are using shredded pine mulch. It, like cypress, does not break down quickly.
Pine mulch is common down south, not so much up here in the North.
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Old 04-24-2013, 03:12 PM   #9
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Pine mulch is common down south, not so much up here in the North.
Our landscape designer/contractor gets it from East Texas.
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Old 04-24-2013, 06:42 PM   #10
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Killing wild grass in mulched flower beds


Preen works for me. I try to be as accurate as possible.


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Old 04-24-2013, 10:15 PM   #11
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Preen works for me. I try to be as accurate as possible.


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Please tell me how "you" apply Preen. I've discovered different people apply it different ways.

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