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Old 06-19-2018, 06:51 PM   #1
Sleepy
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Default St Augustine Iron Deficiency?

Iíve been battling these yellowing patches for 2 years (as long as Iíve lived here). The grass itself is healthy, grows along with the rest of the yard, itís just yellow. Not all the yard is this way. Would you say this is a sign of iron deficiency?

Adding iron is about the only thing I havenít tried. Any experience with Ironite? Any other options?








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Old 06-19-2018, 06:53 PM   #2
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Grubs. Been pretty rough this year
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Old 06-19-2018, 06:57 PM   #3
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Grubs. Been pretty rough this year
I figured if it was grubs, the grass wouldíve been gone by now. And my backyard is the same which is treated regularly with insecticides to battle the fleas and other pests.
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Old 06-19-2018, 07:00 PM   #4
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Your grass looks thin at those spots. How about a thin layer of compost over the areas? Say about a half inch. It will at least add some nutrients to the area. Just buy a couple bags of the good stuff.
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Old 06-19-2018, 07:00 PM   #5
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I figured if it was grubs, the grass wouldíve been gone by now. And my backyard is the same which is treated regularly with insecticides to battle the fleas and other pests.
$50 bill says its grubs. insecticides for fleas dont treat grubs. Its grubs, try something thats just meant for them.

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Old 06-19-2018, 07:02 PM   #6
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Your grass looks thin at those spots. How about a thin layer of compost over the areas? Say about a half inch. It will at least add some nutrients to the area. Just buy a couple bags of the good stuff.
Thanks, may try that

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$50 bill says its grubs. insecticides for fleas dont treat grubs. Its grubs, try something thats just meant for them.

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Any recommendations?
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Old 06-19-2018, 07:11 PM   #7
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Dylox
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Old 06-19-2018, 07:16 PM   #8
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Soil test?
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Old 06-19-2018, 07:52 PM   #9
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Seems weird it would be iron deficient in just a few spots. It's struggling for a reason. Probably bugs or fungal
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Old 06-19-2018, 07:57 PM   #10
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I bet it is grubs as well. Bayer has a hose-end application that works well. My parents use beneficial nematodes and have great success.
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Old 06-19-2018, 08:06 PM   #11
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Itís chlorosis. Topdress with beach sand from Destin and youíll be in good shape.


Ironite hose end sprayer.
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Old 06-19-2018, 08:06 PM   #12
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Iron Deficiency is your problem
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Old 06-19-2018, 08:08 PM   #13
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Itís chlorosis. Topdress with beach sand from Destin and youíll be in good shape.


Ironite hose end sprayer.
Ha! Guys got jokes!!
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Old 06-19-2018, 08:10 PM   #14
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Grubs usually donít effect until later in the summer.
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Old 06-19-2018, 08:16 PM   #15
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Soil tests are cheap. Get it tested and then apply the proper fertilizer. Insecticide couldn't hurt just in case. Be sure to water it in good or it won't get to the grubs.
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Old 06-19-2018, 09:43 PM   #16
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Reach down at surface level and grab a hand full and if roots come up with grass it is grubs, if it breaks off easily with no roots could be disease. Also can stab with shovel and pull up one scoop and you will see the grubs if they are there.
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Old 06-19-2018, 09:56 PM   #17
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Thanks guys. Looks like it could be a few things. Will check it out this week. May look into the soil test too.
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Old 06-19-2018, 10:03 PM   #18
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When I get yellow grass, I sow in ironite. I am by no means an expert, but it has worked so far. I am new to st Augustine for the most part, so in to learn as well.


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Old 06-19-2018, 10:07 PM   #19
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Not grubs. I would try the Ironite.
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Old 06-19-2018, 10:11 PM   #20
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I’m impressed by what looks like hydrangeas that look that good. I haven’t noticed any yellow areas in my st Augustine yet but have in the past. I’m following along for what you determine especially considering we’re most likely similar soil type given our close proximity. Good luck
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Old 06-19-2018, 10:28 PM   #21
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Iím impressed by what looks like hydrangeas that look that good. I havenít noticed any yellow areas in my st Augustine yet but have in the past. Iím following along for what you determine especially considering weíre most likely similar soil type given our close proximity. Good luck
Hey old neighbor. Iíll keep you posted. And those pictures donít do those hydrangeas justice. They are pretty large and full to the max. They always do really well. It may just be where they are planted and the amount of sun/shade they receive.
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Old 06-20-2018, 03:29 AM   #22
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Peat moss, peat moss, peat moss

Battling the same thing here for the past two years. Finally put some down this Spring in the front and the yard is green as ever. Ironite did nothing to mine.

Just bought some peat moss to do the back yard today as it started turning yellow this week like yours.

The hardest part with peat moss is spreading it evenly. Major PIA
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Old 06-20-2018, 12:51 PM   #23
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Be careful if you use Ironite. Try not to get it on wet concrete driveways or sidewalks. The iron will actually begin to rust on the concrete and leave little rust spot stains. I spread it on San Augustine and forgot to sweep the excess of my front sidewalk. After I watered the yard, I noticed the little rust spots.
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Old 06-20-2018, 01:50 PM   #24
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Peat moss, peat moss, peat moss

Battling the same thing here for the past two years. Finally put some down this Spring in the front and the yard is green as ever. Ironite did nothing to mine.

Just bought some peat moss to do the back yard today as it started turning yellow this week like yours.

The hardest part with peat moss is spreading it evenly. Major PIA
Thatís interesting. It helps acidify the soil & recommended for azaleas too. Iíve never put it in the yard. Good info
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Old 06-20-2018, 02:00 PM   #25
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Glad this post came up- I was searching the web this morning to solve the same issue.I have noticed that it seems to be happening to several yards in the area.Problem is as common as it seems ,there are two to three possible scenarios that are making it happen,from grubs to iron.I guess I will treat for both.
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Old 06-20-2018, 02:16 PM   #26
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I'm also in the not grubs camp. I've had grubs. The yard doesn't yellow, it just dies. It all dies.
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Old 06-20-2018, 02:26 PM   #27
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I started throwing an iron fertilizer from a grass farm in Robstown, TX.
Man! I have an English garden growing now in Kingsville where I had about giving up on dirt and crabgrass. or a while there I was happy to have crabgrass!

It works!!
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Old 06-20-2018, 03:16 PM   #28
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Can you take a close up pic of the blades?
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Old 06-20-2018, 03:24 PM   #29
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What time of day and how often do you water?
Are you in Williamsburg?

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Old 06-20-2018, 03:27 PM   #30
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Quote:
Originally Posted by Pintail45 View Post
Can you take a close up pic of the blades?
I can, but the yellow blades have dark green veins

Quote:
Originally Posted by jlinville View Post
What time of day and how often do you water?
I water as needed. Once the blades start shriveling, Iíll hit it. Will also just spot water on a few of the hot spots in the yard. Itís usually every 2-3 days for about 15 minutes with pop-up spray heads.

I looked at the possibility of over watering, but my back yard is shaded and I donít water that but maybe once a week and it even has the big yellow splotches.
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Old 06-20-2018, 03:34 PM   #31
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over watering was my first thought, but that kills that theory.
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Old 06-20-2018, 03:37 PM   #32
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Quote:
Originally Posted by IowaHunter View Post
Your grass looks thin at those spots. How about a thin layer of compost over the areas? Say about a half inch. It will at least add some nutrients to the area. Just buy a couple bags of the good stuff.
I had a similar issue last year and I put down some compost and it greened up nicely. I thought I had grubs but couldn't find any and I listened to Randy Leman one day and he recommended compost to another person.
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Old 06-20-2018, 03:38 PM   #33
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I had a similar issue last year and I put down some compost and it greened up nicely. I thought I had grubs but couldn't find any and I listened to Randy Leman one day and he recommended compost to another person.
Just any good compost in a bag?
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Old 06-20-2018, 04:01 PM   #34
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I resodded my front yard after taking out two bald cypress trees. The St. Augustine just wouldn't grow under them and the rest of the grass just wasn't that great. Added nitrogen a month or so ago and mine is really looking good!!

Soil test wouldn't hurt but I bet it's the iron...
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Old 06-20-2018, 05:58 PM   #35
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I have a couple streaks like this too.I read iron deficiency also.
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Old 06-20-2018, 06:25 PM   #36
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I am having the same issues. Soil test said it was anemic. Needs iron
I suspected it was the Scotts weed and feed I used this year
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Old 06-20-2018, 08:02 PM   #37
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Im just agreeing with whatever RMW says. Hes a pro
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Old 06-20-2018, 08:15 PM   #38
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I am having the same issues. Soil test said it was anemic. Needs iron
I suspected it was the Scotts weed and feed I used this year
Interesting. I always use that really early on, then once it warms up and starts growing, I use a 15-5-10. May have to see if this iron works and then maybe not use Scottís next year and see what happens.
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Old 06-20-2018, 08:54 PM   #39
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Quote:
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Just any good compost in a bag?
I just bought some at Lowe's, i don't remember what i got i don't think it was anything special.
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Old 06-20-2018, 08:57 PM   #40
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Quote:
Originally Posted by BigDraw View Post
I am having the same issues. Soil test said it was anemic. Needs iron
I suspected it was the Scotts weed and feed I used this year
funny thing every year that i used Scott's weed feed i get chinch bugs and when i don't i don't get them, i wonder if the lack of iron attracts them.
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Old 06-20-2018, 09:17 PM   #41
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Need some iron or someone walking down the street is taking a leak in your yard.
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Old 06-21-2018, 08:46 AM   #42
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http://www.randylemmon.com/lawns/Gar...k_07-17-03.htm

This is about the yellowing you are seeing.....Randy Lemmon is a good site for all grass/gardens/plants questions.....See his lawn fertilizing schedule..
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Old 06-21-2018, 08:55 AM   #43
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Quote:
Originally Posted by TxAg View Post
Seems weird it would be iron deficient in just a few spots. It's struggling for a reason. Probably bugs or fungal
Quote:
Originally Posted by Mike Murphey View Post
http://www.randylemmon.com/lawns/Gar...k_07-17-03.htm

This is about the yellowing you are seeing.....Randy Lemmon is a good site for all grass/gardens/plants questions.....See his lawn fertilizing schedule..
After reading this I change my mind. Thanks for the link.
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Old 06-21-2018, 09:05 AM   #44
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Quote:
Originally Posted by Mike Murphey View Post
http://www.randylemmon.com/lawns/Gar...k_07-17-03.htm

This is about the yellowing you are seeing.....Randy Lemmon is a good site for all grass/gardens/plants questions.....See his lawn fertilizing schedule..
Quote:
Originally Posted by TxAg View Post
After reading this I change my mind. Thanks for the link.
Thanks for the link.

Well we will see what happens. I started with the cheapest option first and that was the liquid Ironite which attaches to the water hose. I was at Walmart yesterday afternoon so I picked up a bottle and treated the front yard with it. Iíll update in a few days, or when I see improvement. Supposedly the liquid form is fast acting since it is absorbed through the roots AND the leaves.
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Old 06-21-2018, 09:26 AM   #45
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Iron deficiency can look patchy like that in new growth but I'm thinking it's fungal. East Texas soils are usually acidic and don't have micronutrient deficiencies. Without an up close pic, google grey leaf spot and see if that's what you have.
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Old 06-21-2018, 09:31 AM   #46
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I'm going with Fungal infection. Try a systemic fungicide on those spots and give it a week or two.
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Old 06-21-2018, 02:45 PM   #47
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This stuff Works!

I get it in Robstown, TX from a St Augustine grower.
Before applying this all I could get was crab grass and weak Augustine.
I also apply the stuff for bugs about once a month.

I use a hand held broadcaster, takes 5 minutes to apply a 1/2 bag every 2 months.
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