Quote Originally Posted by gypski
I wouldn't recommend using them. Mine have a date on the top. My Big Bloom is 07.21.10. So its fresh. :thumbsup:
Well, just in case someone has the same question, I contacted FoxFarm about it. Honestly was expecting them to tell me to buy more, since they're running a business, but instead here is what she said:

Well to answer your question the soluble Cha Ching is good for 4 years. As for the liquid nutrients the Big Bloom is good for up to 4 years and the Grow Big and Tiger Bloom are good for 3 years. So you are still good to go with what you have, to use them again if you are ready to start a new garden.