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Discolored fertilizer

This is a discussion on Discolored fertilizer within the General Orchid Culture forums, part of the Orchid Culture category; Has this happened to anyone else? I have a bag of 20-14-13 fertilizer that is ...

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  1. #1
    Laura81 is offline Orchid Wrangler
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    Exclamation Discolored fertilizer

    Has this happened to anyone else? I have a bag of 20-14-13 fertilizer that is a little over a year old that has gone from its normal blue color to a pale greenish-grayish color. I'm assuming it results from exposure to oxygen and/or moisture. Do you think it is still good to use, or should I get rid of it and buy new? I don't have that many plants, so I don't go through it very fast.

  2. #2
    Brutal_Dreamer's Avatar
    Brutal_Dreamer is offline Dreaming with my eyes open...
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    I know that it is not a good idea to use fertilizer that has been diluted for a long time. Try keeping your fertilize in a plastic storage bin that is air tight. Maybe it will last longer for you that way. As to if this fertilizer is still good, I am going to go out on a limb and guess that it has degraded in potency. It probably is not 'bad', but probably is not as strong as it was when new. JMHO I would try using it and if I did not get the results I expected, then I would get new.

    Cheers,
    BD

  3. #3
    SheilaJ is offline Junior Member
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    I've talked to a couple of friends who know a fair amount about chemistry, and they say the dry stuff doesn't really lose potency, certainly not in a year or two.

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