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Mineral elements which are required by plants for growth and which individually make up to 0.5% to 3.0% of the dry weight of a plant. Macrocutrients include: carbon (C), hydrogen (H), oxygen (O), phosphorus (P), potassium (K), nitrogen (N), sulphur (S), calcium (Ca) and magnesium (Mg).
* N, P, and K (in this order) are the macronutrient essential elements listed as the three numbers on fertilizer labels and under the guaranteed analysis
** Ca, Mg, and S are considered "secondary" macronutrients by some sources
In addition to these macronutrients, the other essential elements for plant growth (known as micronutrients) are:
Iron (Fe)
Boron (B)
Manganese (Mn)
Molybdenum (Mb)
Chlorine (Cl)
Copper (Cu)
Zinc (Zn)
