| It depends on the method in which it was manufactured. If you Goggle Worm Tea you will see a number of articles from Ohio State University where they use a once through liquid run-off and say to use it in 1-2 days.
The product I use from Our Vital Earth is a super concentrate with may added minerals. It has a shelf life of 9-12 months as a concentrate and I have had good results on the diluted solution for 1-2 months. Usually I try not to mix more than I will use in a couple of weeks.
Other brands and methods can be anywhere in between.
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jerry  |