Plants & Flowers
Published
April 17, 2026
Author
The Searles Gardening Team
The Melbourne International Flower and Garden Show is full of inspiration. From enormous showstopping displays to the quieter beauty of hundreds of tiny hanging baskets. All those colours and shapes are absolutely wonderful. But as any experienced gardener knows, the real magic isn't what you see on top. It's what's happening underneath. Growing medium is the number one failure point for most gardeners, and it's often the last thing people think about.
We all know plants need water and sunlight - that's gardening 101. But what actually separates a bad dirt from a great soil? The answer has a much bigger impact on your garden than most people realise. Whether you're growing in pots, hanging baskets, or garden beds, the growing medium you choose sets the foundation for everything that follows.
Here in Australia, we're lucky to have a standard certification system for bagged potting mix that takes all the guesswork out of choosing. When you're standing in the nursery aisle, the first thing to do before you read anything else on the bag is look for the familiar Australian Standards tick mark logo.
It's usually about the size of a matchbox and you'll find it in one of the four corners on the front of the bag. It will typically be red and white or black and white.
But finding the tick alone isn't enough. The key is finding the word premium within that logo. Only then can you be truly guaranteed that the soil has met the premium standard and will perform the way you need it to.
Sometimes you'll see the word "regular" or "standard" on the logo, or no word at all. This can be confusing, but it essentially means it isn't a premium soil - and it's best to avoid these options if you want your plants to thrive.
A great example of a premium-certified potting mix is Searles Platinum Potting Mix. It sounds great - and once you dig into the details, it really is. Not only does it carry the premium certification logo, but the formulation itself is packed with features that set it apart.
Searles Platinum Potting Mix includes 18 months of slow-release fertiliser, double-strength water-penetrating granules and crystals, and a whole range of nutrients, trace elements, and minerals drawn from a rich variety of sources - including potash, fish, soil, seaweed, and volcanic rock. That's a seriously impressive lineup for anyone wanting to give their plants the best possible start.
Next time you're at your local nursery or garden centre, take a moment before you grab the nearest bag off the shelf. Flip it over, find the tick, and check for that word: premium. It's a small thing, but it makes a world of difference to your plants.
Searles products can be found at local nurseries and garden centres near you - find out where to buy. Happy gardening!
Look for the Australian Standards certification tick on the front of the bag. More importantly, check that the word "premium" appears within that logo. This is your guarantee that the mix has met the highest standard. If the logo says "regular" or "standard," or has no word at all, it's best to choose something else.
It's usually about the size of a matchbox and located in one of the four corners on the front of the bag. It will typically be printed in red and white or black and white.
Searles Platinum carries the premium Australian Standards certification and offers an impressive nutrient profile - including 18 months of slow-release fertiliser, double-strength water-pentrating crystals, and a broad range of trace elements and minerals sourced from potash, fish, soil, seaweed, and volcanic rock.
Absolutely. Premium-certified potting mix is formulated to support healthy root development, retain moisture more effectively, and provide sustained nutrition. It's one of the most impactful investments you can make for your garden.
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