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Thread: nutrient burn why?

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    New Member spazer's Avatar
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    Arrow nutrient burn why?

    I have a grow room 1200mm by 900mm with a 600w hps 8 plants in 4.5 ltr buckets each in cocco i am using cocco/canna as the nutrient solution i'm running low e.c. at .5 and a ph of 6 they are in the budding cycle and still getting nutient burn does anyone no why please.

  2. #2
    New Member spazer's Avatar
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    Re: nutrient burn why?

    This is a ongoing prob. this is my second grow first with the same prob it goes on through the whole grow i do regular water flushes.

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    420 Member McBudz's Avatar
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    Re: nutrient burn why?

    I'm not sure. Have not used canna nutrients. Do you have pictures of the burn?

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    New Member spazer's Avatar
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    Re: nutrient burn why?

    i have been getting the burnt spots on the larger fan leaves and now on two of them at the top of the two main stems im getting hooking and folding over and also a lot of yellowing but i asume thats from lack of nutrients is a 4.5 ltr pot too small?

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    420 Member flyfishinrock's Avatar
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    Re: nutrient burn why?

    are you sure its burn not n def?

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    New Member spazer's Avatar
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    Re: nutrient burn why?








    Last edited by Soniq420; 03-15-2009 at 07:54 AM.

  7. #7
    420 Member McBudz's Avatar
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    Re: nutrient burn why?

    Looks like Calcium Def. Are you using an RO water filter?

  8. #8
    New Member spazer's Avatar
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    Re: nutrient burn why?

    no i use rain water ph 6.0 if it is a calcium def. how do i treat that?

  9. #9
    420 Member McBudz's Avatar
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    Re: nutrient burn why?

    use a cal-mag supplement.

    More info...

    Calcium (Ca) -Macro Nutrient and an Immobile element.

    Calcium is another important element that helps the plants cell walls, cell division in making the plants stems, stalks, branches stronger, as well as contributing to root growth, mostly the newer root hairs, Calcium also helps enhancing the uptake of K in the the plants roots. Calcium moves really slow within the plant and tends to concentrate in roots and older growth.

    When plants exhibit a Calcium deficiency the younger leaves are the first to show it as well as older leaves. The Leaf tips will die back, the tips may curl, and growth of the plant is stunted. The plant can show a weakness in the stems and branches, as well as a under developed root system that can lead to bacteria problems with roots dieing off. Having slow plant transpiration rates can aggravate the uptake of calcium. Make sure your soil isn’t very acidic, for calcium gets harder to be absorbed through acidic soils, Which leads to having a plant that is deficient in Calcium. The leaf tips, edges and new growth will or may turn a yellow/brown colour that happen in spots and often surrounded by a sharp brown outlined edge and then the leaf tips die back. If too much calcium is given at an early stage of growth it can stunt the growth of your plants. Having to much of calcium will also flocculate when a concentrated form is combined with potassium. The parts affected by a calcium deficiency are the roots. Stem or petiole, young or old leaves.

    Too much Calcium will lead to other micronutrient deficiencies. Calcium fixation is caused by many types of mediums such as: clay soils, unbuffered coco and humus. The lime tends to bond to these soils very easily. The stems of the plant will not be able to hold the plant up and will exhibit a white brown in between the veins of the leaves when having too much calcium. Also having to much potassium and or nitrogen will cause a calcium lockout.

    Problems with Calcium being locked out by PH troubles

    Very acidic soils with excessive potassium, dry and or wet soil. Lack of calcium in the soil may cause too acidic soil. This may cause to Mg or Iron deficiency or very slow stunted growth

    Soil

    Calcium gets locked out of soil growing at ph levels of 2.0- 6.4
    Calcium is absorbed best in soil at a ph level of 6.5-9.1 (Wouldn’t recommend having a ph of over 7.0 in soil) anything out of the ranges listed will contribute to a
    Calcium Deficiency.

    Hydro and Soil less Mediums

    Calcium gets locked out of Hydro and Soil less Mediums at ph levels of 2.0- 5.3
    Calcium is absorbed best in Hydro and Soil less Mediums at ph levels of 5.4-5.8 (Wouldn’t recommend having a ph over 6.5 in hydro and soil less mediums.) Best range for hydro and soil less mediums is 5.0 to 6.0. Anything out of the ranges listed will contribute to a Calcium Deficiency.

    Solution to fixing a Calcium deficiency
    To fix a calcium deficiency you can treat by foliar feeding with one teaspoon of dolomite lime or Garden lime per quart of water, Or Any Chemical/Organic nutrients that have Calcium in them will fix a Calcium deficiency. (Only mixing at ˝ strength when using chemical nutrients or it will cause nutrient burn!)
    Or you can take crushed up dolomite lime or garden lime in a gallon of water and water it in the soil. 1 to 2 teaspoons per gallon of water, which will be slow acting. Garden Gypsum, which is medium absorption. Limestone, which is medium absorption, Rock Phosphate and Animal wastes which are both medium/slow absorption. Note: Caution when using gypsum to an already acid soil (pH that is less than 5.5) can have a very bad effect on different types of plants by effecting the absorption of soil aluminum, which is poison to plant roots.

    Now if you added to much chemical nutrients and or organics, (which is hard to burn your plants when using organics) you need to flush the soil with plain water. You need to use 2 times as much water as the size of the pot, for example: If you have a 5 gallon pot and need to flush it, you need to use 10 gallons of water to rinse out the soil good enough to get rid of excessive nutrients.

    Source:

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    New Member spazer's Avatar
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    Re: nutrient burn why?

    thanks heaps il give it a go and see what happens should i leave the ph at 6.0

  11. #11
    420 Member McBudz's Avatar
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    Re: nutrient burn why?

    Quote Originally Posted by spazer View Post
    thanks heaps il give it a go and see what happens should i leave the ph at 6.0
    I haven't grown in Coco. but check out this thread. What ph do you use with coco

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    420 Member Racefan's Avatar
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    Re: nutrient burn why?

    How can you get nute burn from 300ppm of nutrient? That's what .5 ec roughly equals. My well water starts out higher than that. Those are deficient because they are "HUNGRY". Feed those things. You should have been at about 1.6 ec to 2.0 ec at the point the pictures were taken.

  13. #13
    New Member spazer's Avatar
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    Re: nutrient burn why?

    i tried to get those kind of e.c. last grow and it just seemed to compound the problem but il give it another go cheers.

    would it be too late in the cycle to transplant them into bigger pots, as i was wonder maybe the pots are too small and thats why im having this trouble???

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    Re: nutrient burn why?

    Stupid question...what is e.c?

  15. #15
    New Member spazer's Avatar
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    Re: nutrient burn why?

    An EC meter measures the electrical conductivity of the water. Clean water has a low EC. When you add nutrients and pH adjusters, the EC will go up. You can use this for measuring how many nutrients can put in the water without causing overfertilization.

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