Ferrous Ammonium Sulfate | Liquid Iron for Lawns

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Harts
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Harts » Fri Sep 13, 2019 7:44 am

@MMoore I don't see why you can't cut it. I don't normally have the time to cut and spray back to back but go ahead and do it.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by MMoore » Fri Sep 13, 2019 7:45 am

yeah we are having a bbq this weekend. I wanted to get the FAS down this morning but tonight will have to do.

im going to let my PGR go for a while and im going to watch how it rebounds. I might get one more PGR spray this year but maybe not... my kbg mix is growing pretty damn slow. I would be interested to know what types of kbg grasses are in that sod, because some grow a lot slower than others.... especially pronounced with the PGR.
Last edited by MMoore on Fri Sep 13, 2019 7:47 am, edited 1 time in total.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Drewmey » Fri Sep 13, 2019 7:46 am

Grasshopper wrote:
Fri Sep 13, 2019 6:31 am
Quick question...

Sprayed FAS for the first time yesterday evening.
Will it be ok to leave the FAS on the leaves for almost 24 hours and not water it in myself but wait for the rain forecasted in the evening?

Temperatures have been around 50f overnight and will be a high of 70f today.
I have only been doing this for one year, but I never rinse it off in the spring or fall like every one here. I don't have a sprinkler system and don't water manually unless there's seed down. I know, what a weirdo.

I have noticed darkening in high heat, so I spray FAS a day before forecasted rain when it's summer.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Grasshopper » Fri Sep 13, 2019 7:57 am

Thanks for the quick reply@Harts !

@MMoore I feel you there.. especially with it getting dark earlier now my yard time after the kids go down is getting shorter... I miss mowing at 9pm...
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Pete1313 » Fri Sep 13, 2019 10:47 am

Drewmey wrote:
Fri Sep 13, 2019 7:46 am
I never rinse it off in the spring or fall like every one here.
I dont rinse it off either unless the forecasted high temp is going to get close to 85°F.
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by JERSEY » Mon Oct 14, 2019 2:38 am

Hello everyone.

I have used foiliar apps of Iron before.....primarily Turf Pro which is a 15-0-0 with Iron in a 2.5 gal jug.

I recently came into alot of Moss Out, which is 10% ferrous sulfate, for DIRT cheap. That works well also as a granular app, but MY Question is.........Can I dilute the granular into a liquid and spray it? 2-4oz per gal?

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by g-man » Mon Oct 14, 2019 6:36 am

Yes you can as long as the product is only ferrous sulfate (no other inert stuff, binders that could plug the nozzle). I would do 2 -4 oz per 1000sqft.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by JERSEY » Mon Oct 14, 2019 8:19 am

Thank you G Man.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by ryeguy » Tue Oct 22, 2019 8:22 pm

How late does everyone do iron apps? Til the very last mow?

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Harts
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Harts » Wed Oct 23, 2019 6:50 am

This is personal preference. Some like to spray up to the very end. Others like a nice dark green for Halloween.

My last app was approx a month ago. The cooler temps and moisture have helped my grass maintain its green.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by NJ-lawn » Wed Oct 23, 2019 8:41 am

I usually spray it with my winterizer app.....most satisfying one I do all year.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Pete1313 » Wed Oct 23, 2019 9:04 am

Looks like we have the same question going in 2 threads.

viewtopic.php?f=9&t=14364#p226152
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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by AZChemist » Thu Nov 28, 2019 11:47 am

Thanks @Mightyquinn for the write up!

I applied FAS for the first time today. The solution instantly oxidized when the FS was added as other have reported. While adding citric acid will slow down the oxidation process when in the mixing tank it will inevitably oxidize rapidly once exposed to oxygen when sprayed. The lower pH will also aid in dissolving the Fe as well (not all of mine would dissolve)

Nonetheless, ill add 7% of citric acid and see how it goes! Thanks for the tip.
Drewmey wrote:
Mon Apr 08, 2019 8:53 pm
Dkrem wrote:
Mon Apr 08, 2019 6:12 pm

I sprayed 21 gal of solution again tonight. Just for fun I tossed in a cup of citric acid with the AS to dissolve before adding the Ferrous Sulfate. The solution stayed blue-green.
I had the same experience yesterday, no orange. I used .1oz citric acid, 1.4oz ferrous sulfate, .6oz urea per thousand. Wanted to start low and ramp up until I see how my grass reacts. I figured the urea is twice as much nitrogen as ammonium sulfate so I cut the number down.

So I know 1:14 works as a ratio for citric acid:ferrous sulfate to keep solution blue/green. Could work lower but I only wanted to test on 1ksf and scale doesn't go under .1oz unfortunately.

Also may have to do with what your tap water is as a starting point.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Dkrem » Mon Dec 02, 2019 6:51 am

AZChemist wrote:
Thu Nov 28, 2019 11:47 am
The lower pH will also aid in dissolving the Fe as well (not all of mine would dissolve)
Nonetheless, ill add 7% of citric acid and see how it goes! Thanks for the tip.
I've been able to dissolve quite a bit into a bucket of hot water then dilute into my sprayer.

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by JERSEY » Tue Dec 24, 2019 12:59 pm

Anyone trying to add color in the winter with ferrous sulfate?

was going to spray some moss, and I thought to ask if anyone is spraying entire lawn to give more color over winter.

thanks

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by Stuofsci02 » Fri Dec 27, 2019 10:03 am

JERSEY wrote:
Tue Dec 24, 2019 12:59 pm
Anyone trying to add color in the winter with ferrous sulfate?

was going to spray some moss, and I thought to ask if anyone is spraying entire lawn to give more color over winter.

thanks
Your grass needs to be producing chlorophyll to be green and make use of the iron... For cool season grasses in the winter I don’t think it makes much sense as it is dormant..

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Re: Ferrous Ammonium Sulfate | Liquid Iron for Lawns

Post by JERSEY » Fri Dec 27, 2019 10:55 am

My grass is still fairly green.....just now starting to go brownish
Image
Last edited by JERSEY on Fri Dec 27, 2019 3:36 pm, edited 1 time in total.

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