What Are Fertilizer Numbers?
Why Are Some Numbers Way Higher Than Others?
So, what are fertilizer numbers? The NPK ratio. But why are some of the numbers below ten while other are way above? Well, that’s because there are two main types of fertilizer: low analysis and high analysis.
Low analysis fertilizer has a lower concentration of nutrients, while high analysis fertilizer has a higher concentration of nutrients. Low analysis fertilizer (for example, a 5-5-5) is often used for general purposes, such as maintaining healthy lawns. High analysis fertilizer (for example, a 20-20-20) is typically used for specific purposes, such as improving the yield of crops or correcting nutrient deficiencies.
NPK Ratio and Your Plant’s Needs
Is There a Universal N-P-K Ratio?
You already know the answer to “What are the fertilizer numbers?” It’s nitrogen, phosphorus, and potassium ratio. But what you may not know is that while all plants require these nutrients, they don’t all require them in equal amounts. The right ratio of N-P-K depends on the type of plant you’re growing and the conditions of your soil. In general, most plants do best with a slightly higher amount of nitrogen than phosphorus and potassium. However, there is no single “perfect” ratio that will work for all plants.
NPK Ratios in Granular and Liquid Fertilizers
While the ratios are the same, the actual amount of nutrients that your plant receives from a granular versus a liquid fertilizer can be very different. When you apply a granular fertilizer, only a portion of the nutrients are actually absorbed by the plant roots. The rest remain in the soil, where they can be taken up by other plants or lost through leaching.
In contrast, liquid fertilizers are quickly taken up by plant roots and are less likely to be leached away. As a result, your plant may receive a higher concentration of nutrients from a liquid fertilizer than from a granular one with an equivalent NPK ratio.
And that’s all there is! We hope we were able to exhaust the answer to “What are the fertilizer numbers?” Thank you for reading, and fingers crossed for your garden!
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