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Crabgrass!!!! #5086058
04/25/19 03:06 PM
04/25/19 03:06 PM
Joined: Apr 2013
Posts: 6,160
FL, USA
gregk24 Offline OP
gregk24  Offline OP

Joined: Apr 2013
Posts: 6,160
FL, USA
I fertilized (weed and feed) my lawn for the first time 2 weeks ago, now I have crabgrass that I have never had before. What gives, and how can I get rid of it?


2012 Honda Accord EX-L K24z3
56,xxx miles
PPPP 0w20 / Fram Ultra

2014 VW Jetta SE 1.8T ea888
44,xxx miles
Castrol Edge 0w40 / OEM filter
Re: Crabgrass!!!! [Re: gregk24] #5086062
04/25/19 03:10 PM
04/25/19 03:10 PM
Joined: Oct 2014
Posts: 13,718
Canyon County Idaho
CT8 Offline
CT8  Offline

Joined: Oct 2014
Posts: 13,718
Canyon County Idaho
Crab grass is best stopped by using a preemergent. There are crab grass herbicides that don't always get the best reviews.


2015 F150 2.7
2018 F350 6.2
Re: Crabgrass!!!! [Re: gregk24] #5086066
04/25/19 03:13 PM
04/25/19 03:13 PM
Joined: Mar 2013
Posts: 5,484
The Midwest
skyactiv Offline
skyactiv  Offline

Joined: Mar 2013
Posts: 5,484
The Midwest
Good luck getting rid of it. Despite what you may read, it's darn near impossible to get rid of and not harm the grass around it once it emerges.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual

Re: Crabgrass!!!! [Re: skyactiv] #5086067
04/25/19 03:18 PM
04/25/19 03:18 PM
Joined: Apr 2013
Posts: 6,160
FL, USA
gregk24 Offline OP
gregk24  Offline OP

Joined: Apr 2013
Posts: 6,160
FL, USA
Originally Posted by skyactiv
Good luck getting rid of it. Despite what you may read, it's darn near impossible to get rid of and not harm the grass around it once it emerges.


So should I wait and use a preemergant next year?


2012 Honda Accord EX-L K24z3
56,xxx miles
PPPP 0w20 / Fram Ultra

2014 VW Jetta SE 1.8T ea888
44,xxx miles
Castrol Edge 0w40 / OEM filter
Re: Crabgrass!!!! [Re: gregk24] #5086074
04/25/19 03:25 PM
04/25/19 03:25 PM
Joined: Sep 2009
Posts: 484
indiana
dakota99 Offline
dakota99  Offline

Joined: Sep 2009
Posts: 484
indiana
There are post emergent ways of getting rid of it but I would focus on prevention in the spring. Dithiopyr is a good product to use in the spring, when soil temps hit around 50-55 F. It also has some post emergent qualities too for crabgrass that has just sprouted if you are late with getting it down.

Re: Crabgrass!!!! [Re: gregk24] #5086078
04/25/19 03:28 PM
04/25/19 03:28 PM
Joined: Oct 2014
Posts: 4,461
Utah
CKN Offline
CKN  Offline

Joined: Oct 2014
Posts: 4,461
Utah
Just cut it out. That's the only way.

Re: Crabgrass!!!! [Re: gregk24] #5086082
04/25/19 03:30 PM
04/25/19 03:30 PM
Joined: Apr 2018
Posts: 883
Somewhere in time
Imp4 Offline
Imp4  Offline

Joined: Apr 2018
Posts: 883
Somewhere in time
I've had the most success with pre-emergent treatments.

For stuff that is already growing, Ortho Weed-b-gone with crabgrass control works well.


2001 Mitsubishi Galant 2.4 - 165k+
Grandma's creampuff...
Re: Crabgrass!!!! [Re: gregk24] #5086083
04/25/19 03:31 PM
04/25/19 03:31 PM
Joined: Jul 2007
Posts: 4,590
Midwest USA
LoneRanger Offline
LoneRanger  Offline

Joined: Jul 2007
Posts: 4,590
Midwest USA
You have to lay down the pre-emergent before the soil temp gets to 55 F. An old sage once told me to use certain Holidays to gauge one's lawn fertilization programme. Fertilizer with crab grass prevention around Valentine's day, apply a grass safe broadleaf weed control (pref liquid) around Easter if weeds are appearing, fertilize on or near Memorial Day and Labor Day, apply winterizer at Thanksgiving.

Don't know if the Old Sage knew WTH he was talking about, but it seemed to me a logical course of action to maintain and build one's turf.



'09 Subaru Forester ...................(QS HM 5W30)
'19 GMC Terrain ........................(Factory fill)
'16 Moto Guzzi Stelvio 1200 .....(ENI i-Ride PG 10W60)
Re: Crabgrass!!!! [Re: gregk24] #5086125
04/25/19 04:30 PM
04/25/19 04:30 PM
Joined: Jan 2015
Posts: 1,078
missouri
ragtoplvr Offline
ragtoplvr  Offline

Joined: Jan 2015
Posts: 1,078
missouri
They make hybrid Crabgrass in case there is someone you don't like.

It is actually a decent cattle forage.

Rod

Re: Crabgrass!!!! [Re: gregk24] #5086266
04/25/19 06:34 PM
04/25/19 06:34 PM
Joined: Jan 2017
Posts: 472
NJ
JLawrence08648 Offline
JLawrence08648  Offline

Joined: Jan 2017
Posts: 472
NJ
When the forsythia flowers fall, it's too late too use a pre-emergent. I have had great success with a post emergent but I have a pesticide license and buy commercial grade products though many do not require a license. A license is only necessary for restricted products.

Re: Crabgrass!!!! [Re: gregk24] #5086305
04/25/19 06:55 PM
04/25/19 06:55 PM
Joined: Jun 2002
Posts: 6,730
MI
doitmyself Offline
doitmyself  Offline

Joined: Jun 2002
Posts: 6,730
MI
Are you positive it is crab grass? Could you snap a few close up photos, including the stem and leaf sheath? Here's some good pics at all life stages: http://www.garden-counselor-lawn-care.com/crabgrass-pictures.html

The herbicide Quinclorac is labeled for post emergent control of both grassy and some broadleaf weeds. Available in either a dry flowable or liquid formulation, it has a "caution" label, safer than "warning" or "danger" signal wording. Both smooth and large crab grass species are on the label.

https://www.google.com/search?clien.....0....1..gws-wiz.......0i71.bcko4EmwHwQ

Home Depot has a version with Quinclorac in it: https://www.homedepot.com/p/IMAGE-Crabgrass-Killer-3-Pack-100099416/202277681

A healthy lawn will usually prevent most crabgrass from germinating and growing, but I am not up on Florida turf varieties and management.


Re: Crabgrass!!!! [Re: ragtoplvr] #5086426
04/25/19 08:26 PM
04/25/19 08:26 PM
Joined: Feb 2019
Posts: 87
WA
vw7674 Offline
vw7674  Offline

Joined: Feb 2019
Posts: 87
WA
Originally Posted by ragtoplvr
They make hybrid Crabgrass in case there is someone you don't like.

It is actually a decent cattle forage.

Rod


^that is truly horrible^

Re: Crabgrass!!!! [Re: gregk24] #5086471
04/25/19 09:21 PM
04/25/19 09:21 PM
Joined: Mar 2004
Posts: 22,204
Upstate NY
Donald Offline
Donald  Offline

Joined: Mar 2004
Posts: 22,204
Upstate NY
First I would talk to your county extension and ask how you can get your soil tested. You need to get your soil in good shape so your grass can really grow as it should as a lush and full lawn will cut way down on weeds. The soil in many lawns is acid and need some lime applied. Your soil test will tell you how many pounds per 1000 SQ FT. Your soil test will also tell you about fertilizer needs. This will not happen overnight but should be your direction.

As you are working on your soil, you can plan on spreading a pre-emergent crabgrass preventer next spring when the forthsythia starts to bloom. Barricade is one of the best pre-emergents as is Dimension. Scott's products for crabgrass are not as good as the two mentioned above.

Now for this year I would use Quinclorac to kill the crabgrass. Best to use Quinclorac by itself vs a combo product that kills broadleaf weeds and crabgrass as there is typically not enough Quinclorac in the combo products.

If you can now see the crabgrass it germinated many weeks ago.

You can reseed in the fall after you have cleared out the crabgrass and other fweeds. Many people are using natual or organic fertilizer rather than chemical fertilizer. Mulching grass will cut back a little on the fertilizer requirements.

Last edited by Donald; 04/25/19 09:30 PM.

2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Crabgrass!!!! [Re: gregk24] #5086517
04/25/19 09:57 PM
04/25/19 09:57 PM
Joined: Jul 2005
Posts: 11,418
Maricopa Arizona
dave1251 Offline
dave1251  Offline

Joined: Jul 2005
Posts: 11,418
Maricopa Arizona
I can't get rid of the crabgrass in my backyard you would think it would be impossible to grow grass in the desert.


make the inside of your engine oil cap white.
don't use.
Re: Crabgrass!!!! [Re: dave1251] #5086688
04/26/19 05:53 AM
04/26/19 05:53 AM
Joined: Mar 2004
Posts: 22,204
Upstate NY
Donald Offline
Donald  Offline

Joined: Mar 2004
Posts: 22,204
Upstate NY
Originally Posted by dave1251
I can't get rid of the crabgrass in my backyard you would think it would be impossible to grow grass in the desert.


You probably need to work on improving your soil at the same time your are trying to get rid of crabgrass using an herbicide.

In most cases the reason people have weeds is poor soil. The weeds grow in poor soil but the grass does not do so well.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
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