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Dallisgrass!! Help!

5 years ago
last modified: 5 years ago

This is the first year I have decided to pay attention to my yard (after 13 years of living here). It is a giant mess. I have started keeping an excel spreadsheet to help me understand what has worked and what hasn't worked. I'll start by saying I live in NC (zone 7 - Piedmont), and I need some advice on strategy...

I started the year with Thick'R Lawn in late March, started mowing high (3.25"-3.5") and watering at least twice a week (deeply). Then late April, I applied 2,4-D for (MAJOR) dandelion infestation (no pre-emergent because I had no idea what that was before this year), and then I dethatched, aerated, and applied weed and feed in late May (tons of clover). I then realized I had "grassy weeds" so I bought/applied Quinclorac by early June.

After some extensive research and seeing the grassy weeds simply turn purple, I have realized I have the formidable "Dallisgrass!" (I went on a scavenger hunt and found seedheads, so I am 100% certain that's what this is - refer to picture.) What a disaster! It's literally the worst thing you can have in your yard. So after some more extensive research, I applied Celsius WG yesterday (I used 2tsp in 2 gal. sprayer with a splash of MSO) and now I guess I wait. (I did NOT add Revolver like the instructions suggest because.....it's like $400+?!?!) I am almost certain the Thick'R Lawn has cool season grass seed, so I have probably just killed what I put down in March. Oh well! I have no idea what "grass" was in the yard before seeding, but there really wasn't much of it anyway I guess?

My question is this. I plan to wait 30 days to re-apply the Celsius WG because I know it takes more than one application (and can be used in the heat), but does anyone have any experience with this stuff and know if it will really work? If not, I might as well just Round-up the entire yard and start over. If I had to guess, it's probably 35% good grass (including my March seeding) and 65% of a combination of crabgrass, dallisgrass, clover, and every other weed you can possibly think of. My yard could be a You-Tube Video as an example of the worst yard ever. :/ (If someone says it DOES work with Revolver I may be willing to try, but it's just not a gamble I'm willing to take after spending close to $1,000 so far only to find out it may be a lost cause.)

It's too hot to plant seeds, so I feel like I have some time to wait to see if it works, but quite frankly, I don't want to waste any more time and money trying to salvage the unsalvageable. IF the Celsius works, I plan to dethatch, aerate, and overseed again in late September. That will give enough time to get the herbicide out of the soil.

I guess I'm really hoping someone will say it works and I can keep on with my plan to not kill the entire yard with Round-up. The fact that I got around 35% of the yard to grow something in March was promising to me and I want to eventually keep on with my plan and crowd this stuff out. But I am very new to this and don't know if that will work. Digging these ugly things out is not an option because they are just too established and ALL over the entire yard and I can't spot spray because it's all mixed together with the good stuff.

I'm also struggling with the mow high and water strategy too, because dallisgrass LOVES that. So I'm out there spending $80/month on my water bill and mowing twice a week.....only to make the dallisgrass happy?!?! I have no idea what to do! Haha.

Anybody?



















Comments (9)

  • 5 years ago
    last modified: 5 years ago

    I'm in central NC and I will say you need patience. When I bought my house, the yard, both the grass and natural area, were as you described, a disaster.

    For the grass area: I got a contract with a weed killer company. Mine is Weedman (interesting name for today's times) and slowly, the weeds died out and the grass filled in. I did do some aeration and overseeding a few years but don't do it anymore now that the grass is established. They do a pre-emergent, fertilizing and lime. Costs around $500 for the season. I never water the grass. It gets a bit brown in the hot summer but next spring, it's back green and thick.

    For the natural area: I had a lot of dallisgrass. At first I thought it was an ornamental. Ha! I also had a lot of other weeds I used to spray like crazy. Finally, I was advised by a landscape pro to use Snapshot pre-emergent in February. Magic! After the first year, very few weeds. Second year and beyond, no weeds all summer. If a few crop up after a rain, I give them a quick squirt with weedkiller. Gone.

    Good luck!

  • 5 years ago

    If it's a large yard I'd work with it. For a smallish one I'm going to nuke it like yesterday and have a beautiful lawn next spring. How many sf is your lawn?

  • 5 years ago

    Hi All, thanks for the feedback. The yard is approximately 2,000 sq ft (in the front) which is what I am focused on right now. It's now mid-August and I have definitely had to change up strategies a bit over the course of the summer.


    I did end up buying the Revolver to use with the Celcius and it did kill (a few) patches of the dallisgrass. BUT, there were also a LOT of patches that came back with a vengeance. I think some of it even waved at me as I walked by with my sprayer. Ha!


    So by early July, I started encouraging the Bermudagrass like crazy. I was adamant at first that I did NOT want Bermudagrass, but after some extensive research, I realized that is the only thing I have a chance of growing in the full-sun, dead-heat of our NC summers. Plus, that was pretty much the base of the yard and it's aggressive as $#@! so I just decided, "If you can't beat them, join them."


    So, I put down two entire bags of Milorganite over the 4th holiday. Then by mid-July, I could really see the new dallisgrass poking its ugly head through so.....I hit it HARD with glyphosate. No more cat and mouse game. Then I watered like crazy and a week later hit it again. Then watered like crazy and two weeks later....I hit it AGAIN! Now, it's almost completely dead. I have giant patches of muddy brown mush in my front yard, but I don't care because that stuff had to die.


    I feel like I still have two solid months of continuous growing season left for the Bermudagrass to take over, so I'm hoping it can spread out and at least produce a base for next season. But I have ordered Prodiamine for the winter weeds and I also have a spring pre-emergent ready to go in early March next year (crabgrass, etc.) We shall see I guess?


    This year has turned into a bit of a bust because I was really hoping to not have to kill giant patches of yard, but this dallisgrass is relentless. If you leave any sign of life, it comes back even worse! I have been told not to overseed Bermudagrass with additional Bermuda because it will almost never be the same texture of your current (common) grass and will end up looking like another giant patch of weeds. So I am literally just waiting this out to let the current grass take over.


    It's crazy because I filled in two patches of holes with potting soil (where I dug a few of the weeds out), and placed some "runners" of Bermuda into the soil and two days later.....it had started to take root in the potting soil! I'm telling you, if any grass has a chance to choke out weeds and take over a yard....it appears to be Bermuda! (You can see the runners in the pic!) *And a few extra residual weeds...ugh!*




  • 5 years ago

    Have you given any thought at all to what all those chemicals are doing to your soil, the local watershed and all the life other than you that depends on them? And for what, a pure stand of a green carpet that the vast majority of people will never know or care how much time, money and effort you poured into it. An excel spread sheet.

    And now that you are switching to Bermuda, happy twice weekly mowing at a low setting in high season if you want it thick enough to keep the weeds out.

  • 5 years ago

    I actually have, and have stuck with the labels for spray rates. Listen, I do understand the ramifications of my choices this year to *finally* get a yard that I can enjoy, thanks for your judgy concern though? After I get the yard to a place where I don't have to mow a WEED every two days (you apparently have no idea how fast dallisgrass grows) then I will never have to use this stuff again. So yeah, I went all in this year. Mowing GRASS twice a week will be a blessing.


    *shrugs*

  • 5 years ago

    I have a very clear idea of how fast things grow in WNC. I know, I know, some people like lawn mowing and turf, so make your grass healthy and happy with best cultural practices and you won't need so many chemicals.

  • 5 years ago

    Those chemicals tend to have a short half life and break down quickly. I doubt you are harming much. Of course, best practice is not to use them if you don't need to but sometimes it is required for a decent lawn. Nothing wrong with that. Sounds like you are finally kicking dirt and taking names!

  • 5 years ago

    I'm certainly trying! Obviously the ultimate goal is to have a carpet of Bermuda where no weed can poke its ugly head. But no way that's happening with bunches of dallisgrass all over. I had to pull out the big guns this year! 🤣

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