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Old 04-16-2008, 02:31 PM   #1
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Mulch Depth?


Last weekend I mulched a large portion of my yard. I was wary sticking plastic under it as I was thinking it would eventually shred up and make a mess over time. I was thinking anyway that if the mulch is deep enough it should "choke" out weeds and grass from coming up underneath. Is this true? I did nuke one half to see if applying roundup would help over just trying to smother it. My mulch is about 4 inches deep.

Do you guys think this was a good idea?

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Old 04-16-2008, 03:41 PM   #2
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Mulch Depth?


Why plastic under the mulch? The m,ulch is supposed to keep the weeds down but let water pass through and help the soil retain moisture.

I hear no more than 4" of mulch, as any more would be counterproductive, causing the lower layer to begin rotting too soon, and causing mold / mildew issues.

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Old 04-16-2008, 03:56 PM   #3
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Mulch Depth?


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Originally Posted by LawnGuyLandSparky View Post
Why plastic under the mulch? The m,ulch is supposed to keep the weeds down but let water pass through and help the soil retain moisture.

I hear no more than 4" of mulch, as any more would be counterproductive, causing the lower layer to begin rotting too soon, and causing mold / mildew issues.

No idea, it seems pretty common around where I am. People stick plastic under mulch and rock. I had mulch around a tree with no weed control and nothing ever cropped up, so I just was hoping this was a good idea.

I mowed some of the area and just dumped mulch on it, it wasnt dirt. Had a worry the grass would pop up!
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Old 04-17-2008, 08:53 AM   #4
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Mulch Depth?


Instead of plastic, you should be able to go to your local home supply or garden center and pick up a roll of landscape fabric. It's designed especially for your application. It will keep the weeds at bay and allow water to seep through. We've used it for years with great success.

http://store.the-landscape-design-site.com/
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Old 04-17-2008, 08:59 AM   #5
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Mulch Depth?


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Originally Posted by Randell Tarin View Post
Instead of plastic, you should be able to go to your local home supply or garden center and pick up a roll of landscape fabric. It's designed especially for your application. It will keep the weeds at bay and allow water to seep through. We've used it for years with great success.

http://store.the-landscape-design-site.com/

Its kind of late now!

I hit some spots with round-up, hoping the thick layer of mulch and round-up will keep the areas clean!
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Old 04-17-2008, 09:01 AM   #6
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Mulch Depth?


The Round Up will help, but eventually the weeds will come back. The funny thing is that they'll start sprouting up in the mulch! On the plus side, their easy to pull.
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Old 04-17-2008, 09:04 AM   #7
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Originally Posted by Randell Tarin View Post
The Round Up will help, but eventually the weeds will come back. The funny thing is that they'll start sprouting up in the mulch! On the plus side, their easy to pull.

I don't have a problem with pulling weeds, but will the mulch be enough to stop the old grass from growing up?
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Old 04-17-2008, 09:25 AM   #8
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Mulch Depth?


Depends on the grass. The Roundup should help.

What I've had to do in the past was use Roundup and then till the soil after the grass died out. I removed as much of the grass as I could then covered this with landscape fabric the mulched over this.

There are other products you can use that will basically sterilize the soil to kill out any dormant seeds or anything that's even thinking about growing. These kinds of products are used for gravel drives and walkways or even putting in a new garden.

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