Secondary Nutrients

Definition - What does Secondary Nutrients mean?

In cannabis cultivation, the term secondary nutrients refers to the three plant nutrients that the marijuana plants require in higher doses (quantities) than micronutrients, but in much lower doses than the primary nutrients of nitrogen, phosphorus, and potassium.

There are three secondary nutrients marijuana and most other types of plants require. Sometimes they are referred to as secondary macronutrients. In addition to the three primary macronutrients cannabis plants require, regardless of their strain or growth habits, the three secondary macronutrients that are required are calcium, magnesium, and sulfur.

Many plant scientists also believe silicon to be a secondary nutrient as well.

Hydrolife explains Secondary Nutrients

Secondary plant nutrients are necessary for plant health.

  • Sulfur helps develop vitamins, aids in seed production, and is an integral part of forming amino acids.
  • Magnesium is a key component in chlorophyll production and helps plants utilize phosphorus and iron.
  • Calcium plays many roles in regulating plant system functions like respiration and cell division.

In addition to secondary nutrients, plants require micronutrients, which are needed in much smaller quantities than other plant nutrients, but are just as necessary for growth and development. Plant micronutrients include boron (B), chlorine (Cl), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), and zinc (Zn).

Also in addition to secondary nutrients, plants require three primary nutrients: Nitrogen, phosphorus, and potassium (N-P-K).

No matter if they are primary or secondary, all plant nutrients play a major role in the garden. They can be added to cannabis growing mediums via powder or liquid. Some nutrients lose their efficiency when mixed with other nutrients and left to sit for too long, so this is why in cannabis cultivation there are one-part, two-part, three-part, and sometimes four-part nutrient solution regimens recommended for plants. That is, bottle 'A' contains different nutrients than bottle 'B'.

It should also be noted that nutrients are further divided into 'Grow' and 'Bloom' formulas. This is because the nutrient requirements for cannabis plants change in accordance with the plants' growth stages.

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