4.0, 3.0, and 6.0, are referring to the NPK ratio, which is commonly used to indicate the relative concentrations of three essential nutrients in hydroponic fertilizers. NPK stands for Nitrogen (N), Phosphorus (P), and Potassium (K), which are the three primary macronutrients required by plants for healthy growth. Let’s break down what each number represents:
- Nitrogen (N) – 4.0: Nitrogen is crucial for plant growth and is a major component of chlorophyll, which is essential for photosynthesis. It also plays a role in various metabolic processes. The number 4.0 indicates the percentage by weight of nitrogen in the fertilizer. In this case, the fertilizer contains 4.0% nitrogen.
- Phosphorus (P) – 3.0: Phosphorus is essential for root development, flowering, and overall energy transfer within the plant. It also aids in the formation of DNA and RNA. The number 3.0 indicates the percentage by weight of phosphorus in the fertilizer. Here, the fertilizer contains 3.0% phosphorus.
- Potassium (K) – 6.0: Potassium is important for overall plant health, water regulation, and the activation of various enzymes and reactions within the plant. It also contributes to disease resistance and stress tolerance. The number 6.0 indicates the percentage by weight of potassium in the fertilizer. The fertilizer contains 6.0% potassium.