Macro nutrients and cannabis
Cannabis plants need balanced and complete nutrition to develop to their full potential. Most fertilisers formulated for marijuana plants contain a number of macro and micro nutrients, necessary for both the growth and bloom stages. A deficiency or excess of any of these elements can quickly bring nutritional imbalances which affect the performance of plants.
According to their packaging, nutrients for plants have a certain N-P-K number to indicate us the amount of nitrogen (N), phosphorous (P) and potassium (K) contained, the three main nutrients for plants (macro nutrients). Still, the classification of macro and micro nutrients can vary from one source to another, and some of them also include calcium (Ca), magnesium (Mg) and sulphur (S) as macro nutrients.
In this article we'll take a look at the main symptoms of imbalances on any of these 6 elements, which will be classified as macro nutrients. Keep in mind that each cannabis strain has its own needs with regard to nutrition, requiring more or less amount of each of these nutrients. Thus, while one plant may need large amounts of nitrogen to grow, another may present clear symptoms of excess nitrogen with the same amount of fertiliser.