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What does the name NPK 4-5-9 mean?
this is a fertiliser declaration. It means that the product contains a total of :
- 4% nitrogen (N)
- 5% phosphorous pentoxide (P2O5) soluble in water
- 9% potassium oxide (K2O) soluble in water
NPK 4-5-9 is a liquid fertiliser typically used for tomatoes