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Hello,

I am having such a hard time identifying this certain grass in my yard. I have a Fescue blend in my yard, and it is consistent throughout my whole yard. This particular grass is only in a few spots on the left side of my yard. For the past 5 years I have had a horrible yard service in St. Louis tell me constant lies. I asked them if they knew what it was and first, I was told it is Bermuda and spent money on treatment for two years for it to come back the next year. I spoke to them again and was told it was Nimblewill and spend more money on a specialty chemical on top of the countless Ortho Nutsedge Killer. I have tried killing it with Tenacity, but it looked like it was dead last year, but came back this year. How would you guys apply it? I followed the instructions. So now let's just say I parted ways from them. So now I have new lawn care company, and the service tech said it could be Creeping Bent Grass. It is the light green grass I am referring to in the pictures. What do you guys think? Is it really Creeping Bent Grass? Any advice on this would be appreciated.

bent grass is my vote. I have found that roundup the area and reseed is the only thing that will work. In the meantime one can rip it out and slow it a little.

sgkent said:

bent grass is my vote. I have found that roundup the area and reseed is the only thing that will work. In the meantime one can rip it out and slow it a little.

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Awesome! Everything I have read states that Tenacity will kill it unless I am applying it incorrectly. Is the root system deep with Creeping Bent Grass?

There are many aps you can load on your cell phone. I use one called Picture This. Snap a picture of said weed or plant and it tells you ALL about it. Free ap on a Samsung phone. Works great to help me ID my weeds and such.

mbc230 said:

Awesome! Everything I have read states that Tenacity will kill it unless I am applying it incorrectly. Is the root system deep with Creeping Bent Grass?

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Make sure you ID it proper before firing harsh chemicals at it. Might be using the wrong herbicide.

I saw a video on Tenacity last night. It did not do well with a lot of weeds and grasses it should have. Good luck.

sgkent said:

I saw a video on Tenacity last night. It did not do well with a lot of weeds and grasses it should have. Good luck.

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Think it is also for cool season grasses as well. Read the label.

Using your picture provided, Picture This said it is Mondo Grass.

slomo said:

There are many aps you can load on your cell phone. I use one called Picture This. Snap a picture of said weed or plant and it tells you ALL about it. Free ap on a Samsung phone. Works great to help me ID my weeds and such.

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I used the Picture This app and it said it was St. Augustine Grass. I took three different pictures of the areas and it came back with that result. How do I treat it? Is it best to dig out?

mbc230 said:

I used the Picture This app and it said it was St. Augustine Grass. I took three different pictures of the areas and it came back with that result. How do I treat it? Is it best to dig out?

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Focus in tighter.

I got the same on a wider shot of your picture. Said it was St. Aug as you found.

Pull the weed/grass from your yard. Snap another pic without the St Aug grass around it.

slomo said:

Focus in tighter.

I got the same on a wider shot of your picture. Said it was St. Aug as you found.

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I did three separate areas at different ranges and yes even close up and got the same results three times in a row. I am guessing it is St. Augustine Grass and it is the winner. Thank you.

Your dominant grass is St Aug right? What turf type do you have?

slomo said:

Your dominant grass is St Aug right? What turf type do you have?

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I want to say thank you for your help first of all. You are awesome! This is what I did I pulled a sample that would fit in the square on the Picture This app and there is a sample picture attached. I then placed the sample in the square and yes, I got a totally different result. It is Japanese Lawngrass aka Zoysia Japonica. So I am now 100% sure this is the culprit. What do you think?

mbc230 said:

I want to say thank you for your help first of all. You are awesome! This is what I did I pulled a sample that would fit in the square on the Picture This app and there is a sample picture attached. I then placed the sample in the square and yes, I got a totally different result. It is Japanese Lawngrass aka Zoysia Japonica. So I am now 100% sure this is the culprit. What do you think?

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Try another weed ID ap.

Look at Google images for Mondo and Lawngrass. See what you think.

Take that sprig you plucked to a plant nursery. Get their opinion.

slomo said:

Try another weed ID ap.

Look at Google images for Mondo and Lawngrass. See what you think.

Take that sprig you plucked to a plant nursery. Get their opinion.

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So is Picture This wrong? I have had so many folks tell me what they think it is and well it turns out to be something different and I have had several Lawn companies try and tell me. I will look at Mondo and Lawngrass. Thank you.

mbc230 said:

So is Picture This wrong?

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Could be. It is correct on a lot of common things I've found. Try it on something you know what it is.

I named bent grass because we get it here. One photo of the clumping was revealing. Putting greens on golf courses use it because it is so fine. I use roundup to kill it.

Mondo grass has wide blades and is in the lily family. St Augustine has much larger blades and is very heavy.

slomo said:

Could be. It is correct on a lot of common things I've found. Try it on something you know what it is.

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I am new to turf. I know my yard is Fescue hybrid. So St. Augustine is Fescue from what I am reading online. Mondo grass looks like it, but it also looks like Japanese Lawn Grass as well. I am so lost with this.

sgkent said:

I named bent grass because we get it here. One photo of the clumping was revealing. Putting greens on golf courses use it because it is so fine. I use roundup to kill it.

Mondo grass has wide blades and is in the lily family. St Augustine has much larger blades and is very heavy.

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What sort of Roundup do you use? I know there is the Weed Killer etc, but I do not want to destroy the surrounding grass unless I just use Roundup to kill it and then seed the heck out of it and maybe put sod down. I am in St. Louis, Missouri. So is the Fescue the type of grass such as St. Augustine. I am a newbie. Thank you.

Fescue is different that St Aug. St Aug is wider bladed. Several types of fescues. Lots are blends of different grass seeds like Kentucky Blue Grass and so on.

Round Up or the ingrediant called Glyphosate 41% kills everything. Including your dominant grass you want to keep.

Is it the blue green fine blade grass?
If so, it's either bentgrass or Bermuda.

I have a combination tall fescue and bluegrass lawn. When the bermuda that comes in and the bent grass, like once every five to seven years, just kill it, water for a month, kill whatever comes up and then reseed before fall so it is up and rooted before the really cold weather. Sod is Ok on a small area but expensive on a large area. One caveat on sod is that most sod growers use a cocktail to kill off weeds. 2,4-D is one of those chemicals and it is a known carcinogen in some canine breeds. Since we have one of those breeds, we have to buy special untreated sod.

Getting a good pre-emergent down a couple times a year will help keep weeds and unwanted grasses down. The seeds come in on the wind. That reminds me it is time to do my lawn again before the winter POA starts to take off in a couple weeks.

For the record, if AI is involved in the conclusions about the grasses, it is wrong.

Mondo Grass




St Augustine Grass




Zoysia Grass


Bent Grass / Creeping Grass

sgkent said:

For the record, if AI is involved in the conclusions about the grasses, it is wrong.

Mondo Grass

St Augustine Grass

Zoysia Grass

Bent Grass / Creeping Grass

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Sorry for the dumb question. Is Fescue a type of grass as well or just a generic name? Are all the grasses you mentioned in there own family? Like Mondo would be one and then Fescue would be a type of Mondo grass as an example. It looks like Creeping Bentgrass to me based on the last photo. Thank you.

sgkent said:

I have a combination tall fescue and bluegrass lawn. When the bermuda that comes in and the bent grass, like once every five to seven years, just kill it, water for a month, kill whatever comes up and then reseed before fall so it is up and rooted before the really cold weather. Sod is Ok on a small area but expensive on a large area. One caveat on sod is that most sod growers use a cocktail to kill off weeds. 2,4-D is one of those chemicals and it is a known carcinogen in some canine breeds. Since we have one of those breeds, we have to buy special untreated sod.

Getting a good pre-emergent down a couple times a year will help keep weeds and unwanted grasses down. The seeds come in on the wind. That reminds me it is time to do my lawn again before the winter POA starts to take off in a couple weeks.

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Sorry I am just so confused based on these apps you pointed out. It really looks like Creeping Bentgrass to based on the pictures.

Fescue is a type of grass and there are many kinds. It is like saying that is a cow. What kind of cow? Red Fescue, Tall Fescue, Dwarf Fescue etc., and then many different varieties of each based on the plant genetics. You sure you are not AI?