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What is the difference between a herbicide and a fertiliser?

June 29, 2023

Maintaining a healthy and thriving garden or landscape requires careful attention to such critical factors as soil quality, pest control, and nutrient management. Two essential products that can assist with this are herbicides and fertilisers, but what is the difference between them? What do they both offer and when should you use each?


Let's look at the key differences to help you make the right decision for your garden:


fertilisers: enhancing growth

Fertilisers are substances used to improve soil fertility and provide essential nutrients to plants. They contain a combination of macronutrients such as nitrogen (N), phosphorus (P), and potassium (K), along with micronutrients like iron, zinc, and manganese. These nutrients fuel plant growth, enhance root development, and increase resistance to diseases and pests. Fertilisers are typically added to the soil before or during planting or applied as top-dressing during the growing season.


Herbicides: weed control

Herbicides control or eliminate unwanted growth – or, as we commonly call them, weeds. They work by inhibiting essential processes, such as photosynthesis or protein synthesis and are manufactured to selectively target specific plant and growth types or broadly affect a wide range of plant species. Herbicides are commonly applied as sprays or spot treatments to areas with weed infestations, making it easy to ensure the surrounding desirable plants remain unharmed.


Trust Narellan Sand, Soil & Garden Supplies for all your fertiliser and herbicide needs


Now that you know the difference between these two garden control kings, you can get started on creating and maintaining a beautiful landscape or garden of your ow. We stock a wide range of fertilisers and herbicides to suit all types of gardens, and our experienced staff are here to offer advice on the best product for your needs and help you select the right product for your garden. We also provide delivery services so that you can have peace of mind knowing that your supplies will arrive quickly. Contact us today to explore our wide range of products and take your gardening game to the next level.

Additional FAQs

  • Should I fertilise before or after herbicide?

    It is generally recommended to fertilise before applying herbicides. Fertilising first allows the plants to absorb necessary nutrients and strengthen their overall health before weed control measures are implemented.

  • Can you mix herbicide and fertiliser?

    Mixing herbicides and fertilisers is not recommended unless explicitly stated on the product labels. Combining these substances can lead to reduced effectiveness or even damage to plants. It is crucial to follow the instructions provided by the manufacturers.

  • Is a herbicide a chemical or a fertiliser?

    A herbicide is a type of chemical, specifically formulated to control or eliminate unwanted plant growth. Fertilisers, on the other hand, contain a combination of nutrients that provide essential elements for plant growth and development.

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