Old 10-19-2002, 12:26 AM
sirsweatsalot's Avatar
sirsweatsalot sirsweatsalot is offline
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Join Date: Jun 2002
Location: MN
Posts: 296
does fertilizer go bad?

is there a length of time you have before your dry or wet fertilizer goes bad?
4 goats
6x8 trailer with barn boards
*cut & fert in one package deal*
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Old 10-19-2002, 12:50 AM
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KLMlawn KLMlawn is offline
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Location: Long Island, NY
Posts: 443
Dry- Yes, when it gets enough moisture adhereing to it to become wet and useless.
Liquid, I am not sure .... never kept any around long enough to know.
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Old 10-19-2002, 12:57 PM
f350 f350 is offline
Join Date: Feb 2002
Location: mi
Posts: 424
liquids go bad, really fast in the heat. it amoniates ( something like that )
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Old 10-19-2002, 07:07 PM
tremor tremor is offline
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Join Date: Aug 2001
Location: Stratford, CT
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Properly stored dry bulk blended fertilizer doesn't go bad. Store bags as high as possible preferably over a vapor barrier that's got a few pallets stacked on it at the least. Clumpy blends are a bother to break up & screen, but they'll still be "good".

Ammoniated (homogeneous) fertilizers have a shelf life. I'm not exactly sure how long it is though as I recall, the analysis will have something to do with it. 1 year is about the beginning of the end I think. After that, the slow release content & analysis will begin to change to some extent.

Triazone based liquids are pretty stable in storage. I have a bottle of 18-3-6 50% N-Sure that I finally tapped this summer. I've had it for 5 years. It's still fine.

Any fert that is already diluted in water is subject to rapid degradation. When it's hot, Urea based liquids will last only a day or two in the tank. To be sure, use a Ph test strip. The Ph of the mix will quickly climb up to the 9's in the summer. This can be corrected with Phosphouric acid to bring it back down, but this is expensive & dangerous. Acid must be very slowly added or the mix will boil. I once watched a guy get knocked off his tanker by a violent boil over reaction. Had he not been wearing a full face shield & apron, he'd have been burned & blinded.

Just make sure liquids are completely use up at the end of the day.

Store granular ferts high, cool, & dry.

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Old 10-19-2002, 07:25 PM
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robert payer robert payer is offline
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Join Date: Feb 2002
Location: Parma, Ohio
Posts: 282
With paper blend bags, if the bottom of the bag is damp or wet the active ingredient has released. I would think twice before using it where you demand proper results.

I had once put down some slow release fertilizer that had been damp. In 7 days that yard was a jungle. Lucky it was spring! Summer would have spelled death!

Use it where the poor results could slide if you are in doubt.

Ones reputation, word and can do ability is very valuable when it comes to servicing customers.
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