As people, we have daily recommended values of nutrients in order for us to live healthily. While we don’t have an FDA for plants, we understand which nutrients and in what combination various types of plants need to thrive.
For optimal plant health, there are 18 essential nutrients that they require. These can be broken down into three plant nutrient categories: 1) macronutrients, 2) secondary nutrients, and 3) micronutrients.
Infographic Source: https://theindoornursery.com/blog/what-nutrients-do-plants-need/