A lush, green lawn is the pride of any homeowner, and understanding the best lawn fertilisers is key to achieving that picture-perfect turf. Fertilisers provide essential nutrients that grass needs to grow strong and healthy. With so many options available, it's important to know which fertilisers are the best for your lawn's specific needs. This comprehensive guide will help you understand the different types of lawn fertilisers, their benefits, and how to choose the right one for your garden.

Why Fertilising Your Lawn is Important

Fertilising your lawn is crucial for several reasons:

  • Nutrient Supply: Grass, like all plants, needs nutrients to grow. Fertilisers provide these essential nutrients that might be lacking in your soil.
  • Improved Growth: A well-fertilised lawn grows thicker, which helps crowd out weeds.
  • Disease Resistance: Healthy lawns are less susceptible to diseases and pests.
  • Visual Appeal: Regular fertilisation ensures your lawn stays green and vibrant throughout the growing season.

Types of Lawn Fertilisers

There are several types of lawn fertilisers, each with its own set of benefits and ideal applications. Understanding these can help you choose the best one for your lawn.

Organic vs. Inorganic Fertilisers

Organic Fertilisers:

  • Made from natural materials such as compost, manure, bone meal, and seaweed.
  • Release nutrients slowly, improving soil structure and increasing microbial activity.
  • Environmentally friendly and safe for pets and children.

Inorganic Fertilisers:

  • Synthesised from chemical compounds.
  • Provide nutrients quickly, offering an immediate boost to lawn health.
  • More cost-effective but can lead to nutrient runoff and potential environmental impact if not used correctly.

Granular vs. Liquid Fertilisers

Granular Fertilisers:

  • Available in slow-release and quick-release formulations.
  • Easy to apply and ideal for even distribution.
  • Slow-release variants provide nutrients over a longer period.

Liquid Fertilisers:

  • Absorbed quickly by the grass, leading to fast results.
  • Perfect for addressing nutrient deficiencies promptly.
  • Require more frequent applications compared to granular options.

Key Nutrients in Lawn Fertilisers

Lawn fertilisers typically contain three primary nutrients, each serving a unique purpose:

Nitrogen (N)

  • Promotes lush, green growth.
  • Essential for photosynthesis and overall plant health.
  • Often the most abundant nutrient in lawn fertilisers.

Phosphorus (P)

  • Encourages root development and helps establish new lawns.
  • Important for energy transfer and storage within the plant.
  • Typically needed in smaller quantities than nitrogen.

Potassium (K)

  • Enhances grass's ability to withstand stress from drought, disease, and temperature fluctuations.
  • Crucial for overall plant health and metabolism.
  • Balances the effects of nitrogen and phosphorus.

Choosing the Best Lawn Fertiliser

Selecting the right fertiliser for your lawn involves considering several factors:

Soil Testing

  • Conduct a soil test to determine nutrient deficiencies and pH levels.
  • Soil tests provide valuable insights, guiding you towards the most suitable fertiliser for your lawn's specific needs.

Grass Type

  • Different grass species have varying nutrient requirements.
  • Warm-season grasses (e.g., Bermuda, Zoysia) and cool-season grasses (e.g., Fescue, Kentucky Bluegrass) may need different fertiliser formulations.

Season and Timing

  • Fertiliser application should align with the growing season of your grass type.
  • Cool-season grasses benefit from fertilisation in early spring and autumn, while warm-season grasses thrive with applications in late spring and summer.

Environmental Considerations

  • Opt for organic or slow-release fertilisers to minimise the risk of nutrient runoff and environmental impact.
  • Follow application guidelines to avoid over-fertilisation, which can harm your lawn and the surrounding ecosystem.

Top Lawn Fertilisers on the Market

Here are some of the best lawn fertilisers available, each catering to different lawn care needs:

Scotts Turf Builder Lawn Food

  • A popular choice, providing a balanced nutrient mix suitable for all grass types.
  • Contains slow-release nitrogen for sustained feeding.
  • Improves water and nutrient absorption.

Miracle-Gro Water Soluble Lawn Food

  • A liquid fertiliser offering quick results.
  • Easy to apply with a garden hose attachment.
  • Promotes lush, green growth.

Espoma Organic Lawn Food

  • An organic option made from natural ingredients.
  • Contains bio-tone microbes to enhance soil health.
  • Safe for pets and children.

Jonathan Green Green-Up Lawn Fertiliser

  • Formulated for both cool-season and warm-season grasses.
  • Provides a balanced nutrient mix with slow-release nitrogen.
  • Improves heat and drought resistance.

Milorganite 0636 Organic Nitrogen Fertiliser

  • An organic, slow-release fertiliser made from recycled wastewater.
  • Rich in iron, promoting deep green colour.
  • Environmentally friendly and safe for pets.

How to Apply Lawn Fertiliser

Proper fertiliser application is crucial for achieving the best results. Here are some tips to ensure your lawn gets the nutrients it needs:


  • Mow your lawn to a suitable height before fertilising.
  • Water the lawn lightly a day or two before application to help the fertiliser absorb.

Application Techniques

  • For granular fertilisers, use a broadcast spreader for even coverage.
  • Apply liquid fertilisers with a garden hose attachment or sprayer.
  • Follow the recommended application rate on the fertiliser package to avoid over-fertilisation.

Post-Application Care

  • Water the lawn thoroughly after applying fertiliser to help it penetrate the soil.
  • Avoid mowing for a few days after fertilisation to allow the nutrients to settle.

Common Lawn Fertiliser Mistakes to Avoid

Even with the best intentions, mistakes can happen. Here are some common pitfalls to steer clear of:


  • Applying too much fertiliser can burn the grass and harm the soil.
  • Follow the recommended application rates and schedule.

Inconsistent Application

  • Uneven fertiliser application leads to patchy growth and nutrient deficiencies.
  • Use a spreader and follow consistent patterns when applying granular fertilisers.

Ignoring Soil Health

  • Relying solely on fertilisers without improving soil health can lead to long-term issues.
  • Incorporate organic matter and aerate the soil regularly to maintain its structure and fertility.


Understanding the best lawn fertilisers and how to use them effectively can transform your lawn into a lush, green oasis. By choosing the right fertiliser, applying it correctly, and maintaining good soil health, you'll enjoy a beautiful lawn that enhances your outdoor space. Whether you prefer organic options, quick-release formulations, or a balanced mix of nutrients, there's a lawn fertiliser out there to meet your needs. Happy gardening!