Grapefruit tree possibly dying

Discussion in 'Citrus' started by APE992, May 22, 2005.

  1. APE992

    APE992 Member

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    Location:
    Hell, Norway
    I can see this topic has been done over and over again but my case is slightly different than the others. This tree is about 5 years old, my grandmother gave me two seedlings she found inside one grapefruit she had bought. One died in its first year from frost and the one that survived did barely. Unforunately it has been dropping leaves for the last year or so. They turn yellow along the vein and slowly moves out until the leaf drys out and drops. At the end of this last winter it grew a bunch of leaves at the top and a few at the bottom. The main stalk dropped all leaves about 6 or 7 months ago. I haven't been able to identify any pests or disease and attributed it to overwatering, which I used to do once a day until all the soil was visibly moist. It was fine with it until about a year ago. Any help will be greatly appreciated.
     

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  2. mr.shep

    mr.shep Well-Known Member 10 Years

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    Location:
    San Joaquin Valley, California
    When was the last time you changed the soil or gave
    this tree new soil? When you wrote that you watered
    this tree every day, about how much water were you
    applying? How often have you fertilized this tree
    and what kinds of fertilizer have you been using?

    You have a severe zinc deficiency which is causing
    the leaves to appear way too small in size but you
    will also can get a brownish colored lesion (you
    can see a typical lesion to the right of your thumb
    in your HPIM0338.jpg photo) to show up on the
    interior of the leaf, then soon see a fast acting
    chlorosis and then the leaf dries up and falls off.
    You will want to locate a zinc chelate and use it
    as a foliar spray but you will also need to use a
    ground based fertilizer program (more often if
    you are using one now) using either a commercial
    granulated Citrus food or a series of applications of
    a liquid fertilizer such as MirAcid and MiracleGro.

    There is a lot of truth in the title of this link below.

    http://www.uni-hohenheim.de/i3ve/00068900/18920041.htm

    Jim
     
  3. APE992

    APE992 Member

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    Location:
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    I repotted the plant to its current pot about 3 years ago, since then nothing has been added or changed. It was standard potting soil you'd find at any store, it was a quick fix I didn't initially intend to leave but did. As for the water, it was probably no more than 1/4 of a gallon. The container I used to use is long gone but it was a gallon itself, and if memory serves I used only a 1/4 of it and the rest for portions of my garden that didn't have a drip system. For fertilizing, I never have done it. I didn't know what I should be using and since it wasn't showing any problems I never bothered. But obviously there is a problem and I need to start doing it. Many thanks for your time.
     

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