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Tomato Fertilizer: What is the Optimal NPK Ratio for Tomatoes?

Growing perfect, delicious tomatoes is not only an art form, it is a science. Tomatoes are heavy feeders and usually require fertilizer to reach their full potential. The best tomato fertilizer will supply the plants with a good ratio of the big 3 macronutrients of nitrogen, phosphorous, and potassium, while also utilizing the most important micronutrients.

All of the big three macronutrients are necessary if you hope to grow great tomatoes. These elements help the plant in different ways:

  • Nitrogen promotes growth in the foliage and green parts of the plant.
  • Phosphorus helps with flowering and fruiting, which is essential for tomatoes.
  • Potassium increases plant vigor and helps fight stress and disease.

The ratio between the big three is often referred to as N-P-K (Nitrogen-Phosphorus-Potassium), where the number of each is the percentage used in the product. The remaining amount consists of micronutrients and other fillers. 

All-purpose, balanced fertilizer blends like 10-10-10 are easy to find and do a good job of keeping most plants happy. Specialized tomato fertilizers are also available. Some boost the phosphorus slightly (5-10-10 or 2-3-1) to encourage more fruiting. Others include slightly more nitrogen to encourage plant growth (2-1-1), which is important for growing monster tomatoes.

It seems that nearly every fertilizer product has its own specific ratio, and your needs will depend on your current soil composition, so more important is to choose a product that is chemical-free and uses natural ingredients. Many mainstream fertilizers use too many chemical-based ingredients that will actually cause soil burn-out. 

Instead of wasting time on other products, just try Tomato Secret. With the perfect blend of natural ingredients including nitrogen, phosphorus, potassium, carbon and other trace minerals, you will get excellent plant growth, color, taste, and disease resistance. Our superior blend will help feed the microbes to create healthy soil and provide direct nutrition to the plants. It’s not a secret any more… Dr. JimZ Tomato Secret is the best tomato fertilizer on the market!