r/LawnAnswers

Is it possible to replace my old-cultivar fescue lawn with new seed without nuking it?

Last fall I reclaimed a lot of weedy areas around my backyard using the guide on this sub. So far it's been a wild success. But the quality of the new fescue cultivars is soooo much nicer than my legacy front/backyards, which have coarse and disease-prone cultivars.

I plan to again follow the guide to deal with areas that have some nimblewill (and other issues) that weren't as urgent last year. I will be spraying with sublime/surfactant where needed is this and other areas, if that matters.

I wondered: while I have the new seed from twin city/US seed, is there a way to (slowly?) change the composition of my existing lawn? I don't expect to get it done rapidly or even be perfect. It is not worth nuking or ripping things out. But is there a method to gradually replace what sits in the lawn now? Maybe dethatch the area and overseed with the new stuff each growing season? Would a long-term mix of old and new stuff be janky?

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u/oink_circa_2006 — 22 hours ago

Fescue weeds question

North Georgia zone 8.

Is it normal to have this many weeds in fescue this time of year. There’s Virginia button weed, a broadleaf weed I’m not sure the name of, some clover and others as well.

u/Prestigious-Eye-1701 — 16 hours ago

ID help and next steps (again)

Hey all,

Cool season, in West Michigan. Last fertilization was July 20. I posted here a few days before that application and growth was slow and was having spots that looked somewhat similar to this and it was ID’d as Anthracnose.

I was walking my lawn today to pin point spots I’ll have to get some top soil to to help level it a bit. I’m planning on doing some leveling and overseeding on Labor Day weekend.

I found this area. There are two spots within a foot of each other (last pic is both spots). Between them is a small hole that actually has they covering it but can be pulled back. Water gets in there and will settle I’ve noticed. Especially after the rain fall we got yesterday. So I’m wondering what this is, and is the hike responsible.

I’ve also never seen anything like this. The turf is well established but it acts as a door for this small hole. When it’s been dry I’ve ventured around it and don’t see anything that looks like an animal did it. So I’m curious is this the result of the a new build or is it an animal?

The two spots the grass seems very fragile and wet and looks like I could pull it all up. I tried to capture that in the pics.

So my question is what is it, what should I do? So I leave the grass that seems to be super fragile or pull it out and overseed it early next month?

Thanks for the help!

Edit: forgot to add it’s near the property line so I think it may be getting some water from neighbor as well

u/vengaachris — 23 hours ago

Help my lawn for fall

We live in ND and just got hydroseed done in May. 5 days after it was put down, there was a lot of rain, so we are thinking some got washed away based on how patchy the backyard is as compared to the front. So now, the back is struggling, as you can see. There are also spots of our yard that are constantly wet and clay like, making it hard for the grass to grow. Think that'll be a separate issue we need to hire out for... Anyway, the landscaper refuses to come do touch ups for us like he initially said he would. What can we do in the fall and next spring to help promote a better lawn next summer?

u/akar1997 — 1 day ago

Core Aerating Best Practices

Looking for some advice that I haven’t found on any of the guides. I’m in western Washington outside Seattle (Zone 9a) and while I haven’t had the budget to do a full overseed, I’m planning to core aerate this fall and ideally next spring and spread humichar. My soil is fairly compact and I think it’s a small step I can go in the right direction (hoping to do full overseed next fall). I plan to rent a gas powered aerator for this. My questions are as follows:

  1. does timing of the aeration matter? Or weather?
  2. optimal depth to set the tines on the aerator?
  3. are multiple passes desired or just one?
  4. is there a recommended height of cut for the lawn? Currently I’m mowing at 4”

Appreciate the help!!

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u/FishermanFit992 — 1 day ago

Wet wilt be wilting

Just some horrible damage at work. The tee is toast. We’ll be redoing it this winter. Was constructed previously before I came here. The environment isn’t very friendly, soil is garbage, unsure about drainage.

Anyways it pretty embarrassing.

u/Ok-Bet-9392 — 2 days ago

Fungus? Or something else? How to make it green

Lawn experts, I’ve been following all recommendations for my 6b KBG. 4” cuts, deep infrequent watering in early morning, etc… it looked great in late may, until it went a bit dormant during summer heat. Meanwhile my neighbors had their lawn service cut theirs super short all summer and their lawn looked even more dormant. Most of the time short cut lawns looked completely dead. However, as soon as weather cooled down a bit in the last couple of weeks, their lawns immediately went back to lush deep green state, while mine still looks brown almost throughout and very slowly coming back. Night and day difference. It looks like the tall dormant grass layer is not helping at all - it looks bad and makes it much harder for new green blades to grow. Plus parts of it that are laying down creating even more matting in places.

I used liquid chelated iron last week with almost no effect at 8oz/1000 sq ft. 2 days ago I applied Scott’s lawn food to give it some nitrogen (before that last feeding was early June). It looks like it’s finally starting to get better, but I can’t help but wonder if cutting at shorter length would have been beneficial. Maybe it’s fungus?

u/OneTwoLoopie — 2 days ago

Need help with Fertilizer recommendation Cool Season Grass

I'm located in SE Wisconsin zone 5B. I overseeded my lawn in Aug/Sept of 2025 with Twin Cities Blue Resiliance. I had my soil tested in late March 2026 and results said to apply a starter grade fertilizer, to build "P" levels for both my front and backyards in May 15-31. I applied Lawn Synergy's 15-20-10, which came out to be 0.54 lbs of nitrogen per 1,000 sq ft.

I skipped the July application just cause it was too darn hot and I figured I'd stress the grass. Soil test call for the Sept 1-15 application of a general fertilizer (20-30% N, 0 P and less than 5 K to my front yard and it says to apply the starter again to my back yard.

I know from Niles Cool Season guide that he calls for 1-4 lbs of Nitrogen per 1,000 sq ft per year. So here's my dilema. I plan on overseeding again in another week or so with Blue Resiliance. Just plan on cutting super short and bagging the clippings, then scarifying several places that are really thin and in need of more coverage, then overseeding it all. If I lay the seed down and then put down the starter in the back in a week after, how will that effect my overseeding. And since I'm also overseeding the front yard how is it going to work if I put down a high N fertilizer on those new seeds. I can instead put down a starter in the front as well, but then is my lawn getting the nitrogen that it needs. I'm in need of y'alls help so I don't mess anything up.

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u/Grass_Hopper4-0 — 3 days ago

Grass ID

After a garden full of cinquefoil, these grasses which i thought would help turned out that one of them is definetly another weed. Which is the first photo.

The other grass is the problem. I couldn't do much as the sun was killing me. But from what i saw, the roots were less stubborn. Easier to remove, but not as easy as a baby plant.

AI plant identifier apps did not help me, repeating through random species and later confusing it with other plants.

I've shoveled the grass off in the first photo, the rest i hope it is a good turf type.

If you wish to help, here are some extras:

I live in Albania lowlands, in a city. Albania is in the southeast.

Usually mild to maybe slightly cold winters (5/-10 low) and hot summers. (30/45c high)

I need the grass to overtake the cinquefoil, i won't keep it perfect. What matters is if it is a good grass that spreads and makes the garden green.

Is the grass a weed or turf? Do i need to remove it? How do i grow grass without spending a lot of money for lawn grasses?

u/idkwhoisthatguy11111 — 4 days ago

Weeds came up when we were away. This is zone 10a Florida St. Augustine grass. Any body know what it is and how to eradicate?

u/Free_Bear4029 — 4 days ago

Chinch Bugs?

We moved into our house last fall in Southern Alberta, and according to the neighbours, the front lawn was never in great shape with the previous owners.

Since moving in, I’ve been trying to bring it back to life with regular lawn care (spring dethatching, aeration, overseeding, fertilization) and consistent watering. My plan is to top dress the lawn this fall, but I’m wondering if chinch bugs could be causing the patchy/dead areas.

Our neighbours lawns on both sides of us and across the street are noticeably fuller and greener, which makes me think there may be an underlying issue with ours. Given that the front lawn has apparently struggled for years, could chinch bugs be the primary issue, or is there something else I should investigate and address before I do the top dressing.

u/tsaw19 — 4 days ago

What are these dirt mounds?

Every year something does this in my back yard. Is it bees? Something else? How do I prevent it?

u/LollerAgent — 5 days ago

6b? KC, Missouri Seed Supplier

The last fall and this past spring I overseeded with United Seeds TTTF and sprinkled some fine fescue in on the shaded areas in the backyard.

It’s worked fine, but I’m going to try and do a Tall Fescue/KBG mix this go around. Our backyard tends to not really establish well because of dogs and hoping if I can get some KGB it might help infill a little better. But a lot of the seed in the shaded areas that took is currently half dead.

Is United Seeds still good if I get their fescue and KGB mix or should I try twin city this time around? I’ve stuck with United seed because they’re so close and the shipping only takes a day or two but I think I have time to wait longer

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u/imscaredagain — 5 days ago
▲ 4 r/LawnAnswers+1 crossposts

Lawn Leveling assistance

Is this a bad time of year to begin lawn leveling for the Fall overseed? I know it’s not a one-time thing, but I figured I’d get started if possible. I am in Zone 6B, Northern NJ with TTTF grass.

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u/Due-Clue-2425 — 5 days ago

It's bizarre how many random seeds I find in bags of fert...

I'm sure they're overwhelmingly sterilized by just being in a bag of fert... But still feels like it shouldn't happen.

Not limited by brand either. Andersons, Harrell's, spring valley, etc.

That being said, I go through 20-40 bags of fert a day, so I see a lot of seeds because I just use a lot of fert.

u/nilesandstuff — 6 days ago

What to do with our yard and weeds

Hello, first time homeowner in northern US (ND). Our new build home came with hydroseed and the lawn is struggling. Hydroseed went in first week of May, we've done 3 mows due to the back taking forever to grow. Now, some areas are overtaken by weeds. What can we do?

This back area is overtaken and we have some random weeds throughout the yard too. Tried to circle the problem areas in the photos and where the property line is because some of the taller grass is not part of our property. I am thinking we wait until mid September to spray this back are then wait and reseed it in October (what NDSU recommends for our climate to help kill it long term). In the meantime, do we just keep it short?

Then, what can we do about the random spots of weeds and then the circled photo of weeds next to our neighbor? Sadly that area happened due to their dirty washing into our yard from rain before they got grass. And a lot of weeds towards the house here in the other photo and then just random throughout the yard. Could we spray those areas now? TYIA.

u/akar1997 — 5 days ago

Unknown plant (weed) in Jacksonville, FL

Anyone know what this is? I’ve lived in my house for 8 years now and have never seen this before. Now, this summer it is popping up everywhere.

u/Traditional_Hold_308 — 5 days ago

ID Help

I have this aggressive, almost succulent feeling “grass” that seems to have come in with my Bermuda sod. Not terribly hard to pull but there’s a good bit of it and it grows fast and the runners root faster. This is in south east GA, and the sod came from SC. Any idea what it is and best means to remove it?

u/Low_Friendship3987 — 5 days ago