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Johnson Grass Treatment

3,180 Views | 32 Replies | Last: 7 yr ago by B-1 83
zooguy96
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9:09p, 8/24/18
I have an acre and a half new construction house. Of course, Johnson grass everywhere.

What is the most effective way to treat it?
I know a lot about a little, and a little about a lot.
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SunrayAg
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9:18p, 8/24/18
Roundup
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AggieEE2002
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9:22p, 8/24/18
Anything other than the Johnson grass you don't want to kill?
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Log
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9:26p, 8/24/18
Nuke it with Roundup and start over.
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zooguy96
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9:34p, 8/24/18
Well, I'd rather not kill all the other grass, as it'd be a pain in the ass to re-seed.
I know a lot about a little, and a little about a lot.
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ursusguy
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9:42p, 8/24/18
Build a cheap wick applicator. Cut everything down to about 6", then wait 10 days. Johnsongrass will be tallest studd out there.
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SteveBott
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In reply to ursusguy • 9:50p, 8/24/18
What do you means stud out?

OP you have a war on your hands. That grass is a burn the house down problem. Regular strength Roundup will kill what you can see. But depending on how extensive the root system it might not kill the entire root. JG only needs an inch of live root to regrow.

I would take concentrated RU and manually apply to the grass by hand. Good luck
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zooguy96
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9:52p, 8/24/18
So, essentially, I'm going to have Johnson grass for a while. Oh well.
I know a lot about a little, and a little about a lot.
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SteveBott
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10:00p, 8/24/18
Ummm 24 years and counting. But my back fence has a 2 foot city easement and drainage ditch behind it. It is hard to control that sliver of land if grows there it moves into my yard.

I have some super death spray I use to control the easement every spring. Edit and it's a mass death spray that can anything including hackberry trees. It is not selective
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nonameag99
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10:12p, 8/24/18
Try round up for lawns

It doesn't kill "good" grass but i think it kills johnson grass
The Aggie number specified has already been linked with another TexAgs account.
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BurrOak
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2:49p, 8/25/18
Been battling Johnson grass on my place for a couple years now. Go to tractor supply and buy the concentrated glyphosate (roundup main ingredient) and a pump sprayer and mix yourself.
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ursusguy
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In reply to SteveBott • 3:36p, 8/25/18
That was supposed to be stuff.
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cevans_40
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3:55p, 8/25/18
Man you guys kill me. Frequent mowing will kill most of it. Get on any kind of preemergent plan and that will certainly do it. It's really one of the easier weeds to keep out of maintained turf.
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ursusguy
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In reply to cevans_40 • 4:00p, 8/25/18
I my case I am managing prairie remnants, I want the weeds.
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4:04p, 8/25/18
cevans_40
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In reply to zooguy96 • 4:21p, 8/25/18
Where are you located?
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zooguy96
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In reply to cevans_40 • 5:31p, 8/25/18
cevans_40 said:
Where are you located?


East Tennessee.
I know a lot about a little, and a little about a lot.
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cevans_40
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5:56p, 8/25/18
That's a little too far for me to come spray
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cevans_40
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In reply to zooguy96 • 5:57p, 8/25/18
You might look into getting some msma online.
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zooguy96
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In reply to cevans_40 • 6:24p, 8/25/18
cevans_40 said:
You might look into getting some msma online.

Ok. I've sprayed plants in the past durIng my national park internship, but we never treated Johnson grass.
I know a lot about a little, and a little about a lot.
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Micropterus
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9:01p, 8/25/18
OP, what is your good grass your trying to establish? Assuming since you mentioned seeding, it's bermudagrass. If thats the case, here is your solution: Certainty. One app this year followed by two-three applications next year as needed. Fertilize and mow your desired turf as necessary, and it should outcompete the j-grass in future years.
I think I need to figure out a way to open a Texags herbicide shop.
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zooguy96
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9:43p, 8/25/18
Well, I don't know what the hell grass the builders planted. It looks like Kentucky bluegrass, which is pretty common around here. I'll probably overseed with whatever my landscaping friend recommends for around here ( he'll give me his rate).

The back acre is just Johnson grass and a variety of native plants (old farm land) that I've since mowed over.
I know a lot about a little, and a little about a lot.
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Funky Winkerbean
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10:10p, 8/25/18
Are you sure it's Johnson grass?
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Micropterus
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10:10p, 8/25/18
In that case, bomb the back acre and start from scratch with your grass of choice
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SteveBott
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In reply to Funky Winkerbean • 10:15p, 8/25/18
My question as well
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SteveBott
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10:18p, 8/25/18
Texas Johnson Grass

http://www.tsusinvasives.org/home/database/sorghum-halepense
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zooguy96
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1:41a, 8/26/18
Yes, I'm sure it's Johnson grass. I'm well-versed in invasives.
I know a lot about a little, and a little about a lot.
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Funky Winkerbean
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3:54a, 8/26/18
So now you have pasture and you want it to be lawn?
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kdm_01
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In reply to SteveBott • 5:00a, 8/26/18
Interesting article.
Wonder how in the world Minnesota has managed to avoid the weed:
Distribution
U.S. Present: All except AK and MN
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zooguy96
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5:29a, 8/26/18
Well, I'll use about 1/4 acre of it for a garden. Other than that, I'll keep it maintained like a lawn.
I know a lot about a little, and a little about a lot.
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Funky Winkerbean
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In reply to zooguy96 • 9:35a, 8/26/18
Regular mowing should control it.
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Spore Ag
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10:47a, 8/26/18
Concerning hay production how much is too much for a bale. A lot of old timers here do not seem to care too much about it if not to stemmy.
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TXTebone
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2:09p, 8/26/18
Target 6 plus works for me.
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B-1 83
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4:43p, 8/26/18
Roundup and time. Johnsongrass thrives on soil disturbance. It hates competition. Spray now, plant permanent grass, spray a little later, and it will fade away.
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