Potassium Nitrate

Product characteristics

Potassium Nitrate

  • Fully water-soluble, crystalline product
  • Low in chloride, sodium and other detrimental elements.
  • Efficient absorption by plants, due to synergy between potassium and nitrate
  • Used for foliar feeding, fertigation and as ingredient for NPKs.
  • Compatible with most water-soluble fertilizers


Dosing instructions

G / 1.000 l stock solution Total N, 100% as N-NO3 K2O K
In g / 1.000 l or ppm In g / 1.000 l or ppm In g / 1.000 l or ppm
100 13 46 38
130 17 60 50
160 21 75 60
190 25 88 72
210 28 97 80

The table above represents the amount of nutrients in the stock solution. The final concentration in the irrigation water depends on the amount of nutrients in the stock solution, the injection ratio as well as the amount of nutrients in the water used.

Dosing instructions | Fertigation

Crop Application date Total dosage in kg / ha
Fruit trees Possible use from the beginning of fertigation program till 3-4 weeks before harvest. 150 – 400 kg
Vineyards (adult table grapes) Possible use from the beginning of fertigation, thanks to Nitrogen as Nitric form 100 – 250 kg
Vegetables Beginning of vegetative growth and possible use till 2-4 weeks before harversting. 100 – 300 kg
Potatoes From tuber initiation till ripening stage 100 – 200 kg
Tomatoes From 1 month after transplantation until start of maturation stage 150 – 300 kg

Dosing instructions | Foliar

Crop Application date Dosage in kg / application* Concentration of spray solution (w/v)
Apple, pear 1 – 3 applications:
- End of flowering stage / early fruit enlargement
4 – 12 kg/hа 0.5 – 1.5%
Stone Fruits 2 – 3 applications:
- From fruit setting until fruit colouring
5 – 10 kg/ha - 1.0 – 1.5%
Vegetables 2 to 4 applications – As of fruit setting, 10 days interval. 4 – 8 kg/ha 0.5 – 1.0%


Available in packages of 1.000 kg and 25 kg.

Function of Potassium

Unlike nitrogen and phosphate, potassium does not form any vital organic compounds in the plant. However, the presence of potassium is vital for plant growth because potassium is an enzyme activator that promotes metabolism. It also assists in regulating the plant’s use of water by controlling the opening and closing of leaf stomates where water is released to cool the plant. Sufficient potassium in the levels will increase the plant’s drought tolerance.
In photosynthesis, potassium has the role of maintaining the balance of electrical charges at the site of ATP production. Furthermore, potassium promotes the translocation of photosythates (sugars) for plant growth or storage in fruits or roots. It is also involved in protein synthesis. Finally, potassium improves disease resistance, the size of grains and seeds and the quality of fruits and vegetables.

Deficiency of Potassium

Mild chlorosis progressing into dry and leathery burns on recently matured leaves is the first indicator of potassium deficiency. In the next phase of the process, the veins also become scorched or necrosis will set in from the edge of the leave to the inside. Next, the interveinal areas also become necrotic. The veins themselves stay green. The leaves tend to curl and crinkle. In some plants such as legumes and potato, the initial sign of deficiency is a white speckling of the leaves.
Chlorosis as a consequence of potassium deficiency is an irreversible process – even when potassium is applied. The effect of potassium deficiency can be reduced by the presence of sodium, but sodium-rich plants are more succulent than potassium-rich plant.
 Potassium-deficiency-on-vine-leafs  Potassium-deficiency-on-potato-leaves