Phosphorus deficiency

Phosphorus deficiency

A sudden growth stagnation may be the first sign of a phosphorus deficiency. When this deficiency continues, a dark discolouration of the older leaves occurs at the bottom of the plant. With some plant species, the leaves at the bottom of the plant turn pale yellow or dark blue-green, this is due to the accumulation of carbohydrates. With these plant species the veins will colour purple at the bottom. Underground you can recognise a lack of phosphorus due to a decrease in root development.

How do you recognise a phosphorus deficiency?

  • Sudden growth stagnation
  • Dark discolouration of the lower leaves
  • Decreased root development
  • Reduction of leaf extension, leaf surface and number of leaves
  • Reduced disease resistance
  • Reduced yield quality

What is the (possible) cause?

  • Low phosphorus concentration in the soil or substrate
  • The substrate is too wet
  • The pH level is too high (pH > 7) in the soil or substrate, this can reduce the absorption of phosphorus.
  • Too low temperature in the soil or substrate
  • Lack of oxygen in the soil can reduce the absorption of phosphorus

How can you prevent it?

Choose a phosphorus rich potting soil to allow your plant to grow. Ensure that the pH level is between 6.2 and 7, because, as with other elements, the availability of phosphate in the soil depends on the pH value. Choose the right soil temperature, around 21 degrees Celsius. By using basic nutrients like Alga Grow, Alga Bloom, Terra Grow, Terra Bloom, HydroA&B, CocosA&B, you will decrease the chance of a phosphorus deficiency. Please always be aware that abiotic factors like temperiature, light intensity, light instensity, acidity, amount of moisture and wind strength can also have a big influence on deficiencies


How can you cure it?

A fertiliser that contains a lot of phosphorus can provide a solution to eliminate the deficiency. Bat manure (Bat Guano) is a solid option for this. It stimulates root formation and soil life, promotes healthy growth and flowering and ensures an excellent smell and taste. You can also choose to flush your grow system with water only to lower the pH value.


What does phosphorus do for the plant?

Phosphorus is a macro nutrient because plants need it in large quantities to grow and thrive. It plays a major role in the energy supply of the plant, because it is part of Adenosine triphosphate (ATP). ATP acts as an energy supplier for all growth, repair and maintenance processes in the plant. In addition, phosphorus has a share in photosynthesis, the conversion of sugars and the transport of nutrients. Phosphorus plays a central role in both photosynthesis and in the breathing of the plant. The production of sugars during photosynthesis and the conversion of these sugars into energy during respiration enables the plant to carry out all processes. Fast-growing plants use large amounts of phosphorus to produce flowers and fruits during the flowering phase.
Phosphorus deficiency
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