Marijuana Plant Deficiencies as stated by Ed Rosenthal, author of Growers Handbook

Discussion in 'Sick Plants and Problems' started by Cannibalistixx, Nov 5, 2006.

  1. Nitrogen - pale green leaves and then the withering and yellowing of the lowest leaves.

    Phosphorus - small dark green leaves with red stems and red veins. Tips of lower leaves sometimes die. Eventually entire lower yellow leaves die.

    Potassium - On sun leaves, necrotic patches on leaf tips and in patches throughout leaf. Leaves also look pale green. Old growth doesnt absorb nutrient and wont be affected.

    Sulfur - new growth yellows and the entire plant pales. Use 1 tbsp/gal of epsom salt.

    Magnesium - start on lower leaves which turn yellow leaving the vains green only. Growing shoots are pale green and if conditions worsen turn almost white.
    Use 1 tbsp/gal of epsom salt.

    Manganese - yellowing and dying of tissue between veins. use a Fe-Zn-Mn supplement.
  2. All nice and dandy. If you educating us, would help to also mention the causes and fixes for the deficiencies.

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