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Bad spots in St Augustine

Posted on 3/30/26 at 2:47 pm
Posted by LanierSpots
Sarasota, Florida
Member since Sep 2010
71304 posts
Posted on 3/30/26 at 2:47 pm
This is my first time having St Augustine and with a little bit of rain we’re finally getting in South Florida, the grass is starting to get green and look good. I’ve got a few areas that have a few bad spots that were bad last year. Any thoughts on how to get the spots to fill in. Do I just need to sand them?

Overall starting to look good.






Bad spots




Posted by Loup
Ferriday
Member since Apr 2019
17196 posts
Posted on 3/30/26 at 3:11 pm to
There might be a rock or something buried under there. Probe it and see.

If there isn't anything that needs to be pulled out I would sand it and let it fill in. I get some spots like that where dogs piss and they are usually covered back up within a month.
Posted by CatfishJohn
Member since Jun 2020
20761 posts
Posted on 3/30/26 at 3:57 pm to
I was going to say look for rocks or old tree stumps or something sub-surface.

If nothing I’d still dig it out a couple inches deep, fill with soil sand mix, and keep it hydrated.

Always works for my Bermuda.
Posted by LanierSpots
Sarasota, Florida
Member since Sep 2010
71304 posts
Posted on 3/30/26 at 8:53 pm to
Thanks guys. I am going to probe those areas tomorrow.
Posted by tide06
Member since Oct 2011
23908 posts
Posted on 3/31/26 at 1:32 pm to
I wasnt able to save my SA yard due to take all root rot, so take my advice for what its worth, but one of the recommendations for thin spots like that assuming you've already evaluated for grubs, shade and fungus is to take a 50:50 sand/black kow combo and spread it over the impacted area to a .5" to 1" depth.

If there isnt a fungal or grub issue the SA should grow to cover the bare spot given nutrients, sun, water and time.
Posted by ronk
Member since Jan 2015
7625 posts
Posted on 3/31/26 at 4:04 pm to
It appears to be yellowing. More than likely chlorine caused by tarr. Azoxystrobin and a thin layer of peat moss.
Posted by LanierSpots
Sarasota, Florida
Member since Sep 2010
71304 posts
Posted on 5/17/26 at 7:11 pm to
So I removed as much of the thatch as I could from that area, I put a good bit of sand on it and have been watering fairly often and heavy but I honestly think the brown spots are getting worse.


What course of action should I take here. Thats the only bad area I have in my St Augustine. Does it look like I have some kind of fungus? I poked around there with a long screwdriver and I didnt find anything underneath and I dont see any more bugs there than anywhere else


Posted by cgrand
HAMMOND
Member since Oct 2009
49632 posts
Posted on 5/17/26 at 7:25 pm to
that looks like a good place for a flower bed to me
Posted by LanierSpots
Sarasota, Florida
Member since Sep 2010
71304 posts
Posted on 5/17/26 at 7:38 pm to
quote:

that looks like a good place for a flower bed to me


LOL. I am sure my HOA would love that.
Posted by Capt ST
High Plains
Member since Aug 2011
13679 posts
Posted on 5/17/26 at 8:53 pm to
Was there a lot of vehicle traffic at that spot? I had some spots like that from where we hauled equipment to backyard. I used a fork to loosen up the soil and went back with sand mulch mix.
Posted by LSUEnvy
Hou via Lake Chas
Member since May 2011
12667 posts
Posted on 5/17/26 at 9:59 pm to
quote:

peat moss.


St Aug loves this
Posted by LanierSpots
Sarasota, Florida
Member since Sep 2010
71304 posts
Posted on 5/18/26 at 3:21 am to
No. I have been there for almost 3 years now and it was great until about 4 months ago. I have seem similar spots all over our development.
Posted by LSUbest
Coastal Plain
Member since Aug 2007
16815 posts
Posted on 5/18/26 at 7:04 am to
quote:

It appears to be yellowing. More than likely chlorine caused by tarr. Azoxystrobin and a thin layer of peat moss.


https://www.aces.edu/blog/topics/lawn-garden/take-all-root-rot-on-st-augustinegrass/
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