Do nutrients expire and damage plants?

I'm on my 3rd grow of NL x BB. My last grow was about 5 months ago and I'm using the same nutrients I used back then, but I'm just having nonstop problems with my plants this time around. My Foxfarm tigerbloom has been opened for about a year now and there are hard bits in the bottom (crystalized). There is no expiration date on the bottle and I was just wondering if anyone knows what the shelf-life of nutes are once there opened. I really think this might be a major cause of my problems this grow.

That's a really good question.

I have nutrients from Advanced Nutrients, Botanicare and Dutch Master. I just checked all the bottles and not one of them has an expiration date or even any mention in the fine print regarding the shelf life of the product.

Bump!!! Same question!!!

I dont think they do. I use AN too never seen anything on there except for instructions

I know that some nutes I had said suthin like dont ship after this date tho

well, they don't expect you to keep the product for more than 10+ years. so yes there should be expiration in the products itself but not for the time being. Its better to use the products early cause its fresh , then to use it when it wares out.

I have stuff that I use on my houseplants and outdoor plants that I've had for a good 3 years and it still seems to work.

I hate when food products have those encrypted expiration dates that mere mortals can't decode. Fuckers, they do that so you have to throw the shit out and buy new stuff.

misshestermoffitt said:

I have stuff that I use on my houseplants and outdoor plants that I've had for a good 3 years and it still seems to work.

I hate when food products have those encrypted expiration dates that mere mortals can't decode. Fuckers, they do that so you have to throw the shit out and buy new stuff.

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i know how you feel brother. i know how you feel. god damn salesmen, i blame it on the economy and the selfish bastards.

none of mine have visible expiration dates,, i always wondered about that too... im sure you wouldnt want to be using decade old shit but i dont think any harm would come upon it

like i said, its better to use the stuff fresh than when its old. even though it might work as best.