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Thread: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

  1. #1
    420 Member Medical Marijuana's Avatar
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    Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    Are the Leaf Tips Curlling Up, Do the Leaves have Yellow Margins or Tips with Green Veins

    Magnesium (Mg) deficiency.
    Magnesium deficiency will exhibit a yellowing (which may turn brown) and interveinal chlorosis beginning in the older leaves. The older leaves will be the first to develop interveinal chlorosis. Starting at leaf margin or tip and progressing inward between the veins. Notice how the veins remain somewhat green though as can be seen in figure 15.
    Notice how in Figure 16 and 17 the leaves curl upwards like they're praying? They're praying for Mg! The tips may also twist.
    This can be quickly resolved by watering 1 teaspoon Epsom salts/gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil.
    If the starting water is above 200 ppm, that is pretty hard water, that will lock out mg with all of the calcium in the water. Either add a 1/4 teaspoon per gallon of epsom salts or lime (both will effectively reduce the lockout or invest into a reverse osmosis water filter.
    Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients.




    Magnesium (Mg) Toxicity
    Magnesium toxicity is rare and not generally exhibited visibly. Extreme high levels will antagonize other ions in the nutrient solution.

  2. #2
    420 Member SupremeGreen's Avatar
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    Re: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    If a baby clone thats been under the vegi state (in soil) for almost a week is growing but the very tips of a few leafs are yellow and burt looking (only the tips) and curled down is this a sulfur problem

  3. #3
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    Re: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    I find mixing some epsom salts in the medium (soil) is a top idea to eliminate MG defecencies.

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    420 Member SupremeGreen's Avatar
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    Re: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    I was asking questions about that ebison salt a lil while back. So you have used it?
    Is it only when ur plant is lacking MG or anytime is a plus?

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    Re: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    flush it

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    Re: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    i am growing my plants indoors and I think i have the same problem with curling leaves, my plants leaves then dry up totally and drop off, just as tree leaves do in the autumn. If mine is the same as the bottom picture in this thread, what exactly is the cure for this problem, is it just a case of flushing out the soil with ordinary tap water?

    Or is it flush the plant soil and then add Epsom salts? Thanks for any replies.

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    Re: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    yellow leaf 2 weeks old in soil whats the problem ?? i use soil tabs pls help

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    420 Member jwb87's Avatar
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    Re: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    Sounds like the issue I'm having with two of my girls, this picture is not for the faint of heart, and I apologize for the plant abuse in advance:



    1 plant is doing fine, but I have two that are just about dead. Could this be the issue??

    Should I get some ep salts or some peroxide, ty for any and all help!! I just want to save my girls!
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    420 Member The303Stoner's Avatar
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    Re: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    this looks like high heat or too intense light
    Last edited by The303Stoner; 08-01-2011 at 10:52 AM. Reason: the stoner spell checker was off

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    420 Member jwb87's Avatar
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    Re: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    This is what it used to be


    Changed it to this


    The fans keep the temp down to 76 or less.

    Thinking its nute deficiency or lockout, maybe the roots have died on those 2...
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  11. #11
    carolina
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    Post number 129 on www.420magazine.com

    maravillosamente, la pieza muy útil
    www.shampes.com Búsqueda

    sungyoon

  12. #12
    carolina
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    Post number 609 on www.420magazine.com

    Absolutamente con Ud es conforme. La idea bueno, mantengo.
    www.shampes.com Búsqueda

    michell

  13. #13
    New Member Mr.X's Avatar
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    Re: Are the Leaf Tips Curling Up, Do the Leaves have Yellow Margins

    How about adding CalMag?