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Soil & Microbe Booster 3L Pouch

The Details

Our biochar and frass dream team are back and bigger than ever. This 3L pouch means you can start dishing those microbes out amongst your outdoor plant fam. Enough for the indoor crew, the balcony crew and that lifeless bed around the side of the house. 

Here are a few reasons to add this double act to your Plant Care kit:

  • You don’t have to be rich but your soil should be. Frass holds about 240 million microbial colony forming units per gram. It holds up to 200 times more nutrients than worm castings or compost with more diversity of microbes too. They bring life to your potting mix by improving the structure of the soil and providing nutrients to your plants as they break down organic matter. 
  • Biochar keeps plants kicking through dry spells and overwatering. It boosts the capacity of soil to hold nutrients and water, complementing the richness of frass.
  • Frass is full of mainstream and indie hits. On its own, it boasts a nitrogen-phosphorus-potassium (NPK) ratio of 4:2:2. But it’s still full of those underrated trace nutrients to help your plants flourish: iron, copper, zinc and so much more.
  • It’s got some good chitin; the insect exoskeletons that are a natural addition when making frass. This secret weapon activates your plant’s natural defences against pathogens, like the ones that cause root rot. It increases the availability of nitrogen to your plants.

Both are sustainably sourced, carbon-negative and Australian-made.

Jar Volume: 500ml

Safety: Avoid breathing dust or mists, wear gloves and keep moist when handling. Wash hands after use

Please note: We cannot ship the potting mix into Western Australia, Northern Territory or Tasmania due to quarantine restrictions

The Ingredients




Nutrient and Microbe Analysis

Total nutrients: Nitrogen – 2.1%, Phosphorus – .8%, Potassium – 1.1%, Calcium – 6.5%, Magnesium – .7%, Sulfur – 0.3%, Sodium – 0.2%

Trace nutrients Aluminium, Boron, Cobalt, Copper, Iron, Molybdenum, Manganese, Nickel , Selenium, Silicon, Zinc

Frass Bacteria and fungi cell count: 240 million colony forming units (CFU) per gram.


The Directions

Use Description Application
Top Dressing Top dressing existing plants 1-1.5L / m2
Potting soils, garden beds and new trees Adding Soil & Microbe Booster to potting soils, existing garden beds and when planting new trees 1-10% of mass volume of planting/potting mix targeted at root zones
Compost blend Blend Soil & Microbe Booster with your compost blend 1-10% of mass volume
Garden Tees Planting new trees or dressing existing trees 1-5litres / m2

Can be used year round




A white, mould like substance has appeared in the blend. What is it and should i be worried?

ALL good. Remember, our Soil & Microbe Booster is teaming with life. This is a natural mould that can develop with increased humidity and is not harmful to the plants at all. Once used on the plant or in the potting mix, it will disappear.