Just like any living thing, plants need food to survive. Plants receive food through their root systems from a variety nutrients that naturally occur in the earth. When plants are not grown in soil, but rather in a hydroponic nutrient solution, it is up to the grower to ensure that the proper amount of nutrients are being fed to the plants.
Three of the main nutrients that are required for plant growth are nitrogen, phosphorus, and potassium. If any of these are low in supply, you will begin to notice certain signs of plant nutrient deficiency.
Here are ways to recognize the signs of plant nutrient deficiency corresponding to each type of nutrient.
For more information about signs of plant nutrient deficiency check out the original article here.
Feature Image: A nitrogen deficiency is compared to a healthy one.