The Q&A Archives: old orchid fertilizer, does it expire?

Question: I have a jar of orchid fertilizer that I bought maybe 7 years ago. Is it still safe/effective?

Answer: As long as the fertilizer is in a sealed container it should be fine. It may have degraded over the years but that would only render it less potent. I'd go ahead and use it at the recommended dilution. Best wishes with your orchids!

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