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A Comprehensive Guide to Using Mulch for Garden Health in Perth

As we approach the warm and dry summer months in Perth, taking care of our gardens becomes even more important. One crucial aspect of maintaining a healthy and thriving garden is the use of mulch. Many Australian gardeners may be familiar with mulch but are not aware of its full potential and how to use it effectively. In this comprehensive guide, we will explore the benefits of mulch and provide a step-by-step guide on how to use it for garden health in Perth.

What Is Mulch and Why Is It Important?

Mulch is any type of material that is used to cover the soil in a garden. This can include organic materials such as shredded bark, leaves, grass clippings, compost, and even stones or pebbles. Mulch serves many purposes in a garden, including:

  1. Conserving moisture: Mulching helps to retain moisture in the soil by reducing evaporation. This is especially important in Perth's hot and dry climate.

  2. Controlling weeds: Mulch acts as a barrier, preventing weed seeds from reaching the soil and germinating.

  3. Regulating soil temperature: Mulch acts as insulation for the soil, helping to keep it cool in the summer and warm in the winter.

  4. Improving soil health: As mulch decomposes, it adds organic matter to the soil, improving its structure and fertility.

Step 1: Choosing the Right Mulch

Before using mulch in your garden, it is important to choose the right type for your plants and climate. Some factors to consider include:

Organic vs. Inorganic

Organic mulches, such as bark or compost, will break down over time and provide nutrients to the soil. Inorganic mulches, such as stones or plastic sheeting, do not decompose but can still provide insulation and weed control.


In hot and dry climates like Perth, organic mulches like shredded bark or straw are ideal as they retain moisture and regulate soil temperature.

Type of Plants

Some plants may prefer acidic or alkaline soil, so it is important to choose a mulch that will not alter the soil's pH level.

Step 2: Preparing the Garden Bed

Before mulching, it is important to prepare the garden bed by removing any existing weeds and debris. This will provide a clean and even surface for the mulch to be spread on.

Step 3: Applying the Mulch

Once the garden bed is prepared, it's time to apply the mulch. Spread a layer of mulch around 5cm to 10cm thick, making sure to leave a 5cm gap around the base of plants to prevent rotting. For larger plants, you may want to extend the mulch layer up to 15cm thick.

Step 4: Maintaining the Mulch

To make the most out of your mulch, it is important to maintain it regularly. This includes:

Adding Mulch

Over time, mulch will decompose and break down, so it's important to top it up regularly to maintain a 5cm to 10cm layer.


While mulch helps to retain moisture, it is still important to water your plants regularly, especially during the hot summer months.


While mulch helps to control weeds, some may still manage to grow through the layer. Check and remove any weeds regularly to prevent competition for nutrients and water.


Eventually, the mulch will decompose and mix with the soil. To maintain a healthy balance, remove any excess mulch and add fresh layers when necessary.

Using mulch in your garden plays a vital role in maintaining its health and productivity. At Little Loads, our mulch is made from high-quality materials and is perfect for use in Perth's climate. Follow our comprehensive guide to using mulch in your garden, and contact us for all your mulching needs. 

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