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Tifgrand—7,500 sq/ft—Baroness LM56
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Discussion Starter · #1 ·
I've been using this solution for many years with pretty good success on my Tifway lawn. This stuff is similar to the Iron sprays you can buy but it is much cheaper to make it yourself and the products are easily available on eBay. Spraying this solution will help give your lawn a deeper darker green and will generally last a few weeks. This is what you will need.

Ferrous Sulfate(Iron)

Ammonium Sulfate

One of THESE will come in handy to mix it all together.

For every 1K of lawn you will want to mix 4oz of Ferrous Sulfate, 3.4oz of Ammonium Sulfate in 1 Gallon of water. I usually mix it in a 5 gallon bucket of HOT water as it will dissolve faster and easier than it will with cold water. In that 5 gallon bucket, I will mix everything for 8K of lawn in one shot and then dilute it in the sprayer tank.

You will want to spray this in the evening when it isn't as hot outside to reduce the chance of burning your lawn(I have never had an issue with it). You will want to leave it on your lawn for as long as you can. I usually spray it the night before my irrigation is set to go off. I have gotten into the habit of mixing this with my PGR app every 3 weeks as it seems to be perfect timing for applying the stuff.

I wouldn't worry about the 21-0-0 in the Ammonium Sulfate as you are applying such a small amount that it shouldn't have any effect on your overall Nitrogen applications. The Ammonium Sulfate is in the solution to help give it a faster and more intense green up and CAN be omitted if you choose. I have never sprayed without it so YMMV(Your Milage May Very).

The Ferrous Sulfate is the MAIN ingredient for the dark green color.

The Ammonium Sulfate basically acts as a booster for the Ferrous Sulfate and will enhance/speed up the greening process.

Ferrous Ammonium Sulfate for every 1K of Bermuda Lawn
4.0 oz of Ferrous Sulfate (0.8oz of Fe)
3.4 oz of Ammonium Sulfate
1 Gallon of Water(preferably Hot or Warm)

Ferrous Ammonium Sulfate for every 1K of Cool Season Lawn
2.0 oz of Ferrous Sulfate (0.4oz of Fe)
1.7 oz of Ammonium Sulfate
1 Gallon of Water(preferably Hot or Warm)
Avoid the iron on the leaves in summer temperatures.

Edits: add cool season rates to avoid a black lawn.
 
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Tifgrand—7,500 sq/ft—Baroness LM56
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Discussion Starter · #3 ·
GrassDaddy said:
Does this work for cool season lawns?
Yes, but since I don't have one, I can't say how well it will work. I think in the Spring and Fall for Cool Season grasses should be fine and I think KBG can take the same dosage as the Bermuda can. I would maybe start off with a half dose and work your way up to the full dose depending on the grass type and how "hardy" it is.
 

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Tifgrand—7,500 sq/ft—Baroness LM56
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Discussion Starter · #6 ·
SGrabs33 said:
Do you need to worry about these coloring/staining sidewalks/driveways like most other iron products?
Yes, It will stain a driveway or sidewalk just like any other Iron product. I have found that a pressure washer will remove any of the stains though.
 

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Mightyquinn said:
GrassDaddy said:
Does this work for cool season lawns?
Yes, but since I don't have one, I can't say how well it will work. I think in the Spring and Fall for Cool Season grasses should be fine and I think KBG can take the same dosage as the Bermuda can. I would maybe start off with a half dose and work your way up to the full dose depending on the grass type and how "hardy" it is.
Yes, it works great for cool season grasses. I use 3oz ferrous sulfate and 2.5 oz ammonium sulfate per thousand for KBG. Don't go much higher that that, it will burn the grass. Don't ask me how I know.
 

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j4c11 said:
Yes, it works great for cool season grasses. I use 3oz ferrous sulfate and 2.5 oz ammonium sulfate per thousand for KBG. Don't go much higher that that, it will burn the grass. Don't ask me how I know.
Do you usually water after applying?

I tried this once in combination w/ PGR, but, the grass looked sickly afterwards. I didn't try it again. I was very conservative with my rates too. I applied 2oz FS and 1.7 AS to my TTTF/KBG backyard. The PGR + FAS combo looked and smelled like orange soda. :lol:
 

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Since it's a foliar app, I do not water after applying unless there's a very hot day coming up(90+), in which case I water the following morning. I'd suggest cutting the rate in half if applying with PGR, so 1oz FS +0.85oz AS.
 

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Mightyquinn said:
I wouldn't worry about the 21-0-0 in the Ammonium Sulfate as you are applying such a small amount that it shouldn't have any effect on your overall Nitrogen applications. The Ammonium Sulfate is in the solution to help give it a faster and more intense green up and CAN be omitted if you choose. I have never sprayed without it so YMMV(Your Mileage May Very).
Hey MQ I'm a little confused by this last paragraph. If this solution is intended for a quick dark green up and as you say above, the AS is what does the greening part, then why would one choose to omit it? What does the FS(Iron) do? I need to get some 'pop' out of my grass, it's green, but far from a nice dark hunter green(and that's what I want).

TIA
 

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Alan, I think what he is saying is to not worry about the 21% Nitrogen content of the Ammonium Sulfate - as you're not applying much of it by weight. In other words, there is no need to reduce your overall N applied via regular fertilizer applications because you are using FAS. Make sense?
 

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Well, yes and no. I get the part about not worrying about the 21% nitrogen since it's in such a small amount it will nearly have zero effect on one's fertilizing schedule. However, what I don't get is if the AS does the greening part and per MQ that's what It achieves, then why omit it? Isn't that the purpose-to get the dark green? And if you do omit it, what does the FE do if applied alone?
 

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Tifgrand—7,500 sq/ft—Baroness LM56
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Discussion Starter · #13 ·
Ware said:
Alan, I think what he is saying is to not worry about the 21% Nitrogen content of the Ammonium Sulfate - as you're not applying much of it by weight. In other words, there is no need to reduce your overall N applied via regular fertilizer applications because you are using FAS. Make sense?
Ware summed it up pretty good right there! The AS in the solution just helps to speed up/intensify the greening of the FS. It's basically a booster :D
 

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He does say you can omit it.

I suppose it would have been clearer to us novices if the purpose of each ingredient was explained. So here's my take away:

Ferrous Sulfate(Iron)- dark greening component

Ammonium Sulfate- booster to the above to increase efficiency uptake or improve performance.
 

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Tifgrand—7,500 sq/ft—Baroness LM56
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Discussion Starter · #16 ·
Alan said:
He does say you can omit it.

I suppose it would have been clearer to us novices if the purpose of each ingredient was explained. So here's my take away:

Ferrous Sulfate(Iron)- dark greening component

Ammonium Sulfate- booster to the above to increase efficiency uptake or improve performance.
I edited the original post to explain better. Sorry for the confusion on this :eek:
 

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Tifgrand—7,500 sq/ft—Baroness LM56
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Discussion Starter · #19 ·
Alan said:
Mightyquinn said:
I edited the original post to explain better. Sorry for the confusion on this :eek:
Thank you. I wasn't trying to pick apart your post, in fact, I appreciate it. :thumbup: I appreciate it more so now. :D
No, Thank you Alan!! My intent was not to confuse anyone and anything I can do to help clarify anything, I am more than happy to oblige. :thumbup:
 
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