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Old 03-02-2018, 07:12 PM
 
570 posts, read 1,205,814 times
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My yard was mulched in 2014, when the house was built. It has not been mulched for about 4 years. I am planning to mulch it as soon as possible. How much thickness should I go with mulch now? Should it be about 3 inches thick or should it be say 6 inches thick or should it be more than 6 inches thick.

Last edited by spalam01; 03-02-2018 at 07:45 PM..
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Old 03-03-2018, 06:44 AM
 
Location: NC
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If you are trying to control weeds, mulch works by blocking sunlight. So, it depends on what the mulch is made of. Triple shredded bark, 3in. Pine straw, maybe 6 in. Or you could install landscape cloth and cover it with less mulch if you don't plan to plant anything. I personally prefer thinner mulch plus either gentle hoeing of young weeds or judicious use of herbicides when needed. And I avoid landscape cloth because it needs to be removed for new plantings or after it begins to degrade in a few years.
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Old 03-03-2018, 09:38 AM
 
Location: Floribama
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Don’t pile mulch 6” thick, you could potentially smother the fine roots of shrubs and small trees. Like already mentioned, you want just enough to block light from reaching the soil and to hold in some moisture.
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Old 03-03-2018, 09:53 AM
 
Location: LI,NY zone 7a
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Three inches total is more than enough. Scrape back the old mulch to measure how thick it is, and add accordingly to make up the difference.
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Old 03-03-2018, 11:12 AM
 
Location: between three Great Lakes.
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Thickness of the mulch

Silence of the lambs!

(couldn't resist)
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Old 03-03-2018, 12:31 PM
 
Location: Somewhere in northern Alabama
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Six inches of mulch would be gone in south Florida in less than a year. Smothering roots of shrubs and trees is less a problem of mulch than standing water. There was a horticultural garden in the Palm Beach area that was a magnet for Master Gardeners, and the fellow who created it claimed his success was from adding mulch until it was five FEET thick in some areas.
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Old 03-03-2018, 02:20 PM
 
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Three inches is fine.
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Old 03-03-2018, 02:49 PM
 
Location: LI,NY zone 7a
2,111 posts, read 884,893 times
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Quote:
Originally Posted by oldgardener View Post
Three inches is fine.
Or five feet if you live in Florida. Three inches everywhere else might be good for the rest of us tho.
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Old 03-03-2018, 03:12 PM
 
Location: Upstate, NY
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I rake over and pull out moldy old mulch every other season. Then I recreate a sharp cut in the turf up to the bed. This cut is at least four inches deep where possible. Then I backfill with fresh, black, pine mulch that I get from a local mulch guy. It looks almost like coffee grinds. Some areas in my beds are six inches deep, other areas closer to four.
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Thickness of the mulch - (Remulching after 4 years)-8edbb792-2af9-4751-91f9-291d7ed51d89.jpeg  
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