What Should You Never Mix with Fertilizer

Fertilizer is an essential component for the growth and health of your plants, but it's important to use it correctly to avoid harm to the environment and your plants. While there are no specific ingredients in fertilizers that need to be avoided, there are certain combinations that should never be mixed. This guide will help you understand the proper usage of fertilizers and the potential risks associated with mixing them with other substances.

The Importance of Understanding Fertilizer Ingredients

Most commercial fertilizers are made up of three primary macronutrients: Nitrogen (N), Phosphorus (P), and Potassium (K). These three elements are essential for the growth of plants. However, there are over a dozen micro-elements that are also crucial, although they are present in much smaller quantities. Gardeners and growers often rely on their local agricultural extension offices for guidance on what is most effective for their specific plants or trees.

The Dangers of Mixing Fertilizers Incorrectly

One of the primary concerns when using fertilizers is the potential risk of combining them with other substances, especially those that are not compatible. This can lead to harmful reactions, such as the release of dangerous gases, fires, or explosions. Proper knowledge of the chemical components of fertilizers is essential to avoid these risks.

Chemical Reactions and Fire Hazards

Fertilizers often contain fixed ammonia, which is a strong oxidizer. When mixed with a fuel such as hydrocarbon, it can ignite and cause a significant fire or even an explosion. The Oklahoma City Bombing, for example, was carried out using explosives made by saturating drums of fertilizer with diesel fuel.

Acidic Fertilizers and Urea

A specific example of an incompatible fertilizer combination involves urea and acidic fertilizers such as Triple Super Phosphate (TSP). Combining these substances can lead to a partial decomposition of urea, causing the release of ammonia into the atmosphere. This not only wastes the fertilizer but also contributes to air pollution.

Guidelines for Safe Fertilizer Application

Here are some guidelines to follow to ensure the safe and effective use of fertilizers:

Use only organic fertilizers when necessary, especially for sensitive plants. Give plants time to absorb the nutrients from the fertilizer before applying more. Avoid mixing fertilizers with acidic substances, fuels, or oxidizers to prevent harmful chemical reactions. Consult agricultural experts or extension offices for recommendations based on your specific plants and soil conditions. Always read and follow the instructions on the fertilizer packaging carefully.

Conclusion

Fertilizers play a crucial role in plant growth, but their use must be approached with caution to prevent potential hazards. By understanding the chemical properties of fertilizers and adhering to safe application practices, you can ensure the health of your plants while minimizing risks to the environment and your own safety.