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Thread: Need advice on orchid fertilizer

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  1. #1
    Real Name
    My Grow Area
    On a Windowsill.
    Join Date
    Mar 2009
    Member's Country Flag

    Default Need advice on orchid fertilizer

    After months of waiting, my phal bellina has decided to produce a bud at the end of an existing spike. Think it either was resting from previous flowerings (can't take credits for those flowers.) or it wasn't getting enough sun until now. Now with a bud forming, i would need advice on the fert to use. I have 3 types and npk are as follows:

    1) 15-45-15
    2) 7-13-34
    3) 21-21-21

    Which one should i use? Thanks in advance.

  2. #2
    Favorite Orchid(s)
    all of them.
    Join Date
    May 2009
    Member's Country Flag



    N = Nitrogen: helps plant foliage to grow strong.

    P = Phosphorous: helps roots and flowers grow and develop.

    K = Potassium (Potash): is important for overall plant health.

    I recommend use 15-45-15 as bloom booster

  3. #3
    Real Name
    My Grow Area
    Favorite Orchid(s)
    Oncidiums.Odonts and alliance
    Join Date
    Mar 2006
    Auckland new zealand
    Member's Country Flag


    I would not bother changing - use the 21/21/21 all year round

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