How do I permanently get rid of nutsedge?

[420benz]

I just removed all of the bermuda grass and installed zoysia sod that came with nutsedge.The installer of the sod told me to wait
until next year. My question is what should i use to permanently kill it and when should i do this?

 

[cpp gardener]

Sedgehammer and Dismiss are 2 products I have used on nutsedge. Neither one is a one-shot solution. You can use both mixed in one application for more complete control. If you have green, growing nutsedge right now go ahead and give it a shot. Next year try to make your applications before June 21st, the longest day of the year.

 

[Meadowlark]

The above products are not safe for veggie gardens.

The best control I have found is growing a healthy lawn, setting your mower height high, and regularly mowing.

In the garden where food is grown, cover crops are very effective at preventing nutsedge as well as building your soil, but don't leave open spaces. If you get an infestation, pull the plants, being careful to get all the root (and nuts) and properly discard.

Molasses in heavy doses ( about a cup per gallon of water applied as necessary) will kill the nutsedge and is especially effective in heavy concentrated infestations.

 

[cpp gardener]

It’s a lawn, not a veggie garden, so there’s no concern about contamination. Both products give much faster and thorough control of nutsedge than molasses. Another product that does a good job is Drive (quinclorac). I’m not sure how available these are to homeowners in Georgia, but a licensed applicator can get and apply them for you.
Hand-pulling nutsedge is so Sisyphean a task it’s more torture than effective control.

 

[Meadowlark]

It’s a lawn, not a veggie garden, so there’s no concern about contamination.

No concern about contamination. WOW!!.. Do you even read what you write?


No concern...that about sums up the attitude that has gotten us in the terrible shape the environment is in.

No concern.

 

[cpp gardener]

YES, I do read what I write. Do you ever consider that other people can and do garden successfully using practices other than those approved by self-righteous demagogues of Organic orthodoxy. Insufferable organic purists should stick to those forums that strictly adhere to organic principles and leave the rest of us to carry on as rational humans trying to enjoy our hobby and assist each other.
All pesticides available to homeowners go through extensive testing for safety at the federal and state levels.
There will be no residues on vegetables if it is applied on a lawn. Yes, there will be residues in the soil, but nothing to affect the edibility of produce. If the directions on the label are followed carefully, these products are safe.

 

[Meadowlark]

Maybe the Op should check out the impacts of those products @cpp gardener recommends including how long they remain in the soil...I believe one should know that before using and that is NOT "self-righteous demagogues of Organic orthodoxy".

Just common sense. Something which is horribly lacking.

No concern about contamination?

A quick search yields this:

Dismiss facts:

Key points about the environmental effects of "Dismiss" herbicide:

Active ingredient:

The active ingredient in Dismiss is "sulfentrazone," which is considered relatively mobile in sandy soils, meaning it can potentially leach into groundwater under certain conditions.

Surface water contamination:

Dismiss particles can be carried by wind and contaminate nearby water bodies, potentially harming aquatic organisms.

Non-target plants:

Overspray or drift can harm non-target plants in the surrounding area.

Soil impact:

Repeated applications could potentially disrupt soil microbial communities



Sedgehammer facts:

Key environmental concerns with Sedgehammer:

Groundwater contamination:

The main environmental concern is the potential for Sedgehammer to leach through soil and contaminate groundwater, especially when applied in areas with permeable soils or a shallow water table.

Surface water runoff:

Rainfall after application can cause Sedgehammer to run off into nearby water bodies like ponds, streams, and ditches, harming aquatic life.

Aquatic toxicity:

Sedgehammer is highly toxic to aquatic organisms, even at low concentrations, and can disrupt aquatic ecosystems.

Non-target plant impact:

Sedgehammer can also harm desirable plants if not applied carefully.

 

[MiTmite9]

Thank you, Meadowlark for being the voice of reason. What little I read of Sedgehammer/Dimiss ingredients and their toxicity was enough to convince me they're not safe. I love it when the manufacturer states things like "Sulfentrazone is practically non-toxic to small mammals." Practically? NO THANKS.

 

[MiTmite9]

I just removed all of the bermuda grass and installed zoysia sod that came with nutsedge.The installer of the sod told me to wait
until next year. My question is what should i use to permanently kill it and when should i do this?

Please do the research into DIY methods which do not rely on use of pesticides.

 

[Meadowlark]

Thank you, Meadowlark for being the voice of reason. What little I read of Sedgehammer/Dimiss ingredients and their toxicity was enough to convince me they're not safe. I love it when the manufacturer states things like "Sulfentrazone is practically non-toxic to small mammals." Practically? NO THANKS.

That and the number of times it cautioned that "contamination" could result should be enough to give anyone reasonable pause about using, let alone recommending those products.

 

[cpp gardener]

So it’s OK to use any amount of (unregistered with the EPA) table salt (NaCl), which any soil scientist will tell you screws-up soil chemistry big-time and is non-selective, but not OK to use a very small amount of a selective, registered (tested) herbicide to control specific weeds. Good to know science reigns.
You won’t find a licensed Pest Control Advisor who will recommend using salt or molasses as an herbicide because nowhere on either label are they listed as a pesticide and it against the law for them to do so.
As long as you Follow. The . Label. registered pesticides are safe to use. Wear appropriate PPE, use the labeled amount on a labeled pest in a labeled location while taking labeled precautions and it is unlikely you will have issues. The Label Is The Law.

 

[Anniekay]

You only have to keep your grass cut to get rid of Sand Spurs ( that's what we call nutsedge in the South. If you don't let the flower stalks stand then the seed won't mature and spread it around. You had the roots in the ground so it came up through the sod.

I don't worry about it myself. If it can't spread through mature seed, and you keep it cut so the seeds won't be up long enough to mature, the grass roots will eventually kill it.

Using salt and / or molasses as a weed killer is not only ineffective, you turn your soil into an ocean beach with salt and make the ants reallllly happy with the molasses !!

 

[Oliver Buckle]

Using salt and / or molasses as a weed killer is not only ineffective, you turn your soil into an ocean beach with salt and make the ants reallllly happy with the molasses !!

But you might be able to plunge an iron bar into it one handed, to a considerable depth.