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Nitrogen Deficiency

Use Calcium Nitrate or Potassium Nitrate added to the nutrient solution at 20 to 50 ppm Nitrogen

Phosphorus Deficiency

Monopotassium Phosphate is the best Phosphorus source. Add 10 to 20 ppm

Potassium Deficiency

Use Potassium Nitrate or Potassium Sulphate. Add 50 ppm to the nutrient solution and observe

Calcium Deficiency

Use Clacium Nitrate. Add 50 ppm Calcium and observe

Magnesium Deficiency

Use Magnesium Sulphate – Add 20 ppm of Magnesium

Sulphur Deficiency

This is uncommon, but add Potassium Sulphate or Magnesium Sulphate

Trace Elements

The trace elements such as Iron, zinc, copper and manganese etc can usually be rectified by upping the amount of trace mix in your nutrient solution. Alternatively a good foliar feed with a few drops of wetting agent can be used in conjunction with your normal dosing.
Use foliar feeds just after lights out (or in the late afternoon if growing in natural sunlight)
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The required chemicals can be bought from our eShop
For more information on spotting the signs of Nutrient deficiency – search here

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