Premium Potting Soil in Australia: The 2025 Guide to Bigger, Healthier Roots

Australian Standard 3743 sets the minimum bar for potting mixes, but “minimum” won’t win blue-ribbon tomatoes or glossy indoor foliage. 

We hear time and time again from customers that our mixes smash thi benchmark. Below are our standouts and where they fit best in your garden.

1. TurboDirt® Water-Only Super Soil – For All-Out Yield Hunters

TurboDirt Water Only Super Soil is a fully-composted living soil that carries plants from seed to harvest with nothing but water.

Why it wins

  • 100 % organic & ready-to-use—no “cooking” phase.
  • Core blend of aged compost, worm castings, peat moss, perlite & zeolite for perfect air–water balance.
  • Over 20 slow-release organic nutrients plus humic acid and beneficial microbes baked in.

“First time using this soil—fantastic results! Can’t believe how healthy my plants are.” – Stephen R. (5★)

Best for: heavy-feeding fruit, veg & flowering ornamentals, big indoor pots and no-til raised beds.

2. GreenSpace Premium Potting Soil – For Everyday Houseplants & Herbs

GreenSpace Premium Potting Soil skips the cheap wood chunks and focuses on microbe-rich compost plus worm castings.

What makes it special

  • Bark-free formula means zero fungus-gnat habitat.
  • Balanced peat moss & perlite deliver consistent aeration for fuss-free watering.
  • Multiple bag sizes (3 L to 900 L). 

Best for: herbs, leafy greens, succulents, kids’ veggie tubs and anyone chasing premium results on a budget.

3. Chunky Aroid Potting Soil – For Epiphytic & Jungle Plants

Chunky Potting Soil (Aroid Blend) is engineered for fast-drying, oxygen-rich conditions that keep monsteras, philodendrons and hoyas happy.

Stand-out features

  • Large-particle bark & coco chips repel root rot while boosting airflow.
  • Zeolite locks in cations so thirsty aroids never run short on potassium or calcium.
  • 100 % pet-friendly ingredients. 

Best for: monstera poles, hanging baskets and low-light rooms where soils can stay wet too long.

Choosing the Right Mix for Your Climate

Climate Zone

Common Issues

Recommended Mix

Hot & Humid (e.g., QLD tropics)

Waterlogging, gnats

Chunky Aroid for max drainage

Temperate (e.g., NSW coast)

Balanced moisture needed

GreenSpace Premium

Cool & Dry (e.g., Vic highlands)

Slow growth, nutrient lock-out

TurboDirt for biological warmth & nutrient density

Pro-tip: Pair any mix with Root Roids® and Fruit Roids every 2 to 4 weeks to turbo-charge microbial life.

Frequently Asked Questions

How long before I need to fertilise?

TurboDirt feeds HEAVY feeders for10-12 weeks, GreenSpace 6–8 weeks, while Chunky Aroid benefits from light liquid feeds every 4 weeks.

Can I reuse the soil next season?

Yes—top-dress with compost or our Organic Nutrient Kits and re-inoculate with microbes for another full cycle.

Ready to Grow?

Next Steps

  1. Pick your mix based on plant type & climate.

  2. Add Root Roids® at transplant.

  3. Water with rain or de-chlorinated tap water.

Healthy soil. Happier plants. Bigger harvests. Simple.

About the Author

Scott Cheney - Dr Greenthumbs
Scott Cheney is the Director and Founder of Dr Greenthumbs, with over a decade of hands-on experience in organic gardening. Growing up in rural NSW, Scott’s passion for unusual plants – from cacti to entheogens – evolved into a full-blown commitment to chemical-free gardening when he bought his first property in Wollongong. For the past 8 years running Dr Greenthumbs, Scott has developed unique, first-to-market products like TurboDirt Water Only soil and 100% dry amendment fertiliser blends. When he’s not testing new mixes, you’ll find him swapping gardening tips like your local mate, not giving the hard sell.