What are Macro Nutrients?
— Is a component of proteins, which form an essential part of protoplasm and also occurs as stored foods in plant cells. Nitrogen is a part of other organic compounds in plants such as chlorophyll, amino acids, alkaloids and some plant hormones.
Why should you care about Nitrogen?
Well if your plant is deficient of this element then you will notice stunted growth and poor fruit development.
How can you tell if your plant is suffering from nitrogen starvation?
Answer: look for a light green to yellow coloration of leaves.
Now don’t go all Nitro crazy and give your plant an excess of this Element, because, too much of a good thing in the plant world leads to problems.
If your plant is receiving too much Nitrogen, then you will notice very dark green foliage which could lead the plant to become susceptible to drought, disease, insect invasion and the possibility of fruit and seed crops not yielding.
How do you avoid your plant suffering from excesses or deficiencies? Keep a balanced nutrient base and a very close eye on your pH.
— Is a macro-nutrient and an essential part of the process of photosynthesis. It is important in the formation of all oils, sugars and starches in the plant.
The highest percentage of this element occurs in the parts of the plant that are growing rapidly.
Why should you care about Phosphorus?
Well if your plant is deficient of this nutrient, then its leaves may start turning slightly purple along with a delay in plant development which in some cases leads to stunted plant growth.
Like we have said before, in the plant world excess is hardly ever a good thing (unless your plant is producing more than you need
— Is a macro-nutrient which helps to build proteins, aids the process of photosynthesis, plays a part in determining fruit quality and helps the plant ward off diseases.
If your plant is suffering from Potassium deficiencies, then older leaves will turn yellow on their margins (outside edges). The plant will also have irregular fruit development.
If there is an excess of this element in your plant, then it will most likely cause the plant to be deficient of magnesium and calcium.