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We are over run with nut grass and other weeds in every one of our new mulch beds which are between 8" to 12" deep. The roots grow horizontally and extremely difficult to get all of them.

We've tried edging of varying heights, all kinds of chemicals, different mulches and rocks, weed-stop mesh material, and even completely removed the sod underneath on a new bed. Funny thing was a combination of the last two ended up with weeds & nut grass the fastest.

Attention professional landscapers and Agriculture majors: please, please, please let us know if a silver bullet exists to eliminate (or make our chore a lot more manageable) this problem. If we don't find a solution soon, we may just abandon the beds entirely and let the grass "win"!

2006-08-14 17:55:08 · 3 answers · asked by Anonymous in Home & Garden Garden & Landscape

3 answers

I am sooooo sorry! No Silver Bullet, no silver plated one either.Nutsedge is not a grass, but it is a very common weed! It spreads by tubers found at the ends of the rhizomes and it can root down up to 18 inches below the surface!
Most of the plants sprout from tubers not the seeds, so removing the top 6" of soil will remove most of the tubers.
Hand pull all small plants as you see them, Do not use a tiller because it will only move the tubers around in the soil.
Seriously, remove the mulch or soil and refill it with clean mulch or soil.
Here is some landscape fabric that inhibits growth;
DuPont Typar 307 and 312
Weed Barrier Mat
Geoscpe Landscape fabric
Now here some sort of successful Chemicals;
Pre emergants:
Casoron, dichlobenil
Eptam, EPTC
Pennant metolachlor

Apply to young, pre-flowering plants
Finale, glufosonate
Round-up,glyphosate
Sythe, pelagonic acid.

None of this stuff works on Mature Plants that have formed flowers, and most of the stuff doesn't kill the tubers, so repeat application is necessary as new plants develop!
See,No Silver Bullet, Sorry!

2006-08-15 15:10:24 · answer #1 · answered by bugsie 7 · 0 0

Check out this link:
http://www.urbanharvest.org/gardening/basics/weeds.html
...jj

2006-08-14 18:03:46 · answer #2 · answered by johnny j 4 · 0 0

Hahaha.. Nut.

2006-08-14 18:09:42 · answer #3 · answered by Slowkips 3 · 0 1

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