Carenza ed eccesso di Azoto (N), come identificarli sintomi e metodi di intervento. -

Nitrogen (N) deficiency and excess


Nitrogen is one of the macroelements necessary for the plant for its growth, it is absorbed mainly in the vegetative phase and less in the flowering phase. Its deficiency leads to a strong slowdown in growth and consequent yellowing of the inside of the leaves with the veins that maintain the green color, the progression of the deficiency causes the total yellowing of the leaves and their fall.

In some cases it is possible to find that the color of the leaves and branches turns towards red, a symptom that could commonly indicate a deficiency of Phosphorus (P). It should be kept in mind that being a mobile and quickly absorbed element, nitrogen must be administered constantly (always in controlled doses) so as to make it always available to the plant.


Yellowing of the blades leaving the veins green (intervenal chlorosis)

Leaves and branches turning red

Falling leaves


Administer nutrient solution with nitrogen-based elements, such as Biogrow or Alga Grow


The green of the leaf intensifies and manifests an oily appearance, inward deformation and elongation of the internodes. The plant becomes prey to attacks by parasites and fungi, resulting in reduced water absorption capacity. The aggravation of the excess causes much more serious damage: yellowish-orange coloration, underdevelopment and rotting of the roots, small inflorescences.


Stop the administration of nitrogen or fertilizers that contain it, intervene with flushing .