do salts have a use by date

[leedsrhinojohn]

Ive just found some dry salts and was wondering if they would still be ok to use.
Ive found some TNC Trace and some KH2PO4, probably about 3 years old, will they be any good?

 

[Konsa]

Hi
I asked a while ago tge same question.
Indeed they were all good.

https://www.ukaps.org/forum/threads/fertiliser-shelf-life-help.40309/
Regards Konsa

 

[leedsrhinojohn]

Thanks Konsa