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OfflineBuddy Guy
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Registered: 02/21/10
Posts: 196
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Last seen: 14 years, 3 months
Re: What does this look like to you guys? [Re: DudeTron]
    #382812 - 03/12/10 10:52 PM (14 years, 10 months ago)

The plant with all the close ups look more like a magnesium deficiency.

I would say magnesium deficiency due to the following reasons: Magnesium  deficiencies are most common in marijuana grown indoors. The lower and middle leaves are developing yellowy patchy darkness and the veins are staying green and the rusty brown spots on the leaf margins. This plant is 28 days into flower. Magnesium deficiency symptoms first appear around the the time the plant reaches 6 weeks old. First signs of deficiency are. Interveinal yellowing and brown spots  show up on older and middle aged leaves and leaves begin to curl upwards. All these symptoms progress as the deficiency progresses. You can treat this by watering with 2 teaspoons of epsom salt per gallon of water. If this is the sollution. Your plants will begin to turn green from the top to the bottom. Contine to water with epsom salt until the deficiency disappears. Use as a foliar spray for a fst cure. The addition of epsom salt is not necessary your nutrients have available magnesium. 

The plant in the picture that is a picture of a full plant looks like a early nitrogen deficiency. Droopy yellow leaves. Veins are still green. You can treat this by fertilizing with nitrogen or a more complete N-P-K fertilizer.

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OfflineBuddy Guy
Gone Rogue


Registered: 02/21/10
Posts: 196
Loc: Unknown
Last seen: 14 years, 3 months
Re: What does this look like to you guys? [Re: DudeTron]
    #384540 - 03/16/10 09:02 AM (14 years, 10 months ago)

Then you have a potassium toxicity.

  Potassium toxicity is not common and is complicated to diagnose because it is mixed with the deficiencies symptoms of other nutrients. Too much potassium impairs than slows the roots ability to absorb magnesium(this is what your plant is showing), manganese, and some times zinc and iron(which you have had problems with in all your grows). Look for signs of potassium toxicity when symptoms of magnesium, manganese, zinc, and iron deficiencies.


  Treat toxicity by flushing the grow medium of affected plants with a very mild and complete fertilizer. Less than quarter strength. Like eight and sixteen strength fertilizers.

  Severe problems will require that more water be flushed through the grow medium.

  Flush with a MINIMUM of three times the volume of water for the volume of grow medium.

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