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Help! Tall grass weed - grows 2-3x faster than lawn

Posted: Wed Jun 08, 2016 3:06 am
by Mthurm502
Hello all, for the past several years I've had patches of this grass type weed in my yard and despite having my yard treated for weed control it doesn't die! It shows up in groupings in various parts of the yard, it grows incredibly fast and can get about 6-8 inches tall (maybe taller). Can someone please help identify this weed and tell me how I can get rid of it? For reference I am in Kentucky - Ohio river valley. Thank you!

Re: Help! Tall grass weed - grows 2-3x faster than lawn

Posted: Wed Jun 08, 2016 11:08 am
by KeyWee
This is just another kind of grass which is why it did not die after treatment. Herbicides put on lawns are mainly for broadleaf weeds so they won't kill anything in the grass family. I am thinking you are pretty lucky ~ in our yard we just have "green stuff" we mow into a "lawn" and very little of it resembles grass of any kind. You may have to spot spray (or dig) this to get rid of it ~ there are herbicides for grasses available. Don't let it go to seed!

Re: Help! Tall grass weed - grows 2-3x faster than lawn

Posted: Tue Jun 14, 2016 10:52 am
by Mthurm502
Thank you! I'll try it out! (It's taken a couple years to get mine to where there is more grass than "green stuff" :)

Re: Help! Tall grass weed - grows 2-3x faster than lawn

Posted: Tue Jun 14, 2016 5:36 pm
by nltaff
The first picture looks to me like yellow nutsedge, which I have growing in some of my foundation gardens. Apparently, it is really hard to get rid of due to nodules on the rhizomes. Even if you pull it, root and all, these stay in the ground and continue to grow. The rest of the pictures look like couch grass, which I have all over my property. It, too, spreads by root, or rhizome, and I've never had any luck killing it, either. The roots snake under landscape cloth, poke and weave their way through it, and make a tangled mess of any mulch.

Re: Help! Tall grass weed - grows 2-3x faster than lawn

Posted: Tue Jun 14, 2016 7:29 pm
by nltaff
Back with some pictures:
couchgrass2.JPG
couch grass above
couchgrass3.JPG
couch grass rhizome above
yellownutsedge1.JPG
yellow nutsedge above
yellownutsedge2.JPG
more yellow nutsedge above Other pictures I've found online seem to imply this weed likes wet soil. This is probably why it hasn't taken over my property because we are very dry and well-draining. Three years ago we had a little kitchen garden and an adjoining path that went around the house from the back door to the side/front deck. The path forked off, across the yard and down to our lower garage (which is now falling down). Long story short, the garden and paths became inundated with couch grass. You can pull forever, but those rhizomes stay and grow back. I forked up as many rhizomes as I could (discarded bushels of them). Placed new landscape cloth, mulched with small stone. I discarded the mulch and cloth from the path to the garage, filled in with soil and planted grass. On the stone path to the deck, I built a boardwalk. This is working fairly well, as I've only had to pull a few couch grass plants per year that poke through, or creep in from the rest of the lawn. I'm hoping this lasts for awhile.
formerkitchengarden.JPG
Former kitchen garden above
westboardwalk.JPG
Path and boardwalk to the deck above
westyard.JPG
Re-seeded old path above. The couch grass lives in the lawn and yes, it does grow higher and faster, but we can't really tell much difference because there's just so much of it all over. We are very rural and we get every weed seed flying through. Just doesn't make sense for us to try to get rid of them. I just try not to let them go to seed and to keep a sharply cut edge on my gardens (easier said than done).

Re: Help! Tall grass weed - grows 2-3x faster than lawn

Posted: Tue Jun 14, 2016 7:37 pm
by nltaff
As KeyWee says, we just get out there and mow the green stuff, trying not to let it all go to seed and trying to keep it all under control. I'm the only one I know who routinely mows the driveway! (It's stone/gravel)