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1000l-worm-juice

What is Worm Juice?

Worm Juice is a broad term used to describe biological liquids derived from worm cast. Worms Downunder's Worm Juice (Worm Brew) is a concentrated liquid soil amendment used to regenerate soils for improved farming outcomes. DNA testing shows that our Worm Juice is abundant in beneficial bacterial and fungi with exceptionally high levels of disease-suppressive markers. These microbes reduce nutrient lockup in the soil, making more of what’s applied or already present usable to crops. Although Worm Juice is primarily a microbial amendment, the concentrate also contains some essential nutrients, plant growth promoters, hormones and enzymes which support critical biological and chemical processes. 

Worm Juice is an important part of the puzzle, particularly when incorporated alongside nutrition applications.

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Benefits of Incorporating Worm Juice Into Your Soil Programs

The microbes that are present in Worm Juice assist with critical biological and chemical processes such as: 

  • Mineralisaiton: Microbes are the delivery system for nutrients to the plant 
  • Nitrogen Fixation: Converts atmospheric nitrogen into a form usable by plants
  • Phosphorus Solubilisation and Mobilisation: Converts insoluble phosphorus into forms that plants can absorb. This improves root uptake and overall plant productivity.
  • Decomposition, Organic Matter Breakdown and Water Retention: Breaks down complex organic material (e.g. plant residues, compost) into simpler compounds, enriching the soil with humus and improving water retention with the resulting exudates.
  • Soil Structure Improvement: The microbes release exudates that help form stable soil aggregates, increasing aeration, drainage, and root penetration, which improves soil health long-term.
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Benefits of Incorporating Worm Juice with Nutrition

Mixing a nutrient source at lower rates with your application such as urea, MAP, DAP, Super to Worm Juice kicks microbial activity into high gear. These microbes—bacteria and fungi—feed on the extra nutrients, multiplying faster and ramping up their work. For example, nitrogen-fixing bacteria convert more atmospheric N₂ into ammonium (NH₄⁺), while others turn urea’s nitrogen into plant-available nitrates (NO₃⁻) through nitrification.

Phosphorus-solubilising microbes release organic acids that dissolve bound phosphorus into phosphates (PO₄³⁻), ready for roots to take up. This process cuts nutrient lock-ups in the soil, making more of what’s applied or already present usable to crops. The result? Less money sitting in the soil, better nutrient cycling, and a soil system that delivers what plants need, when they need it.

Commercial Use Cases For Worm Juice

Worm Juice is highly versatile and can be used across a range of farming systems:

  • Grazing Ruminants

    Improve pasture recovery times, increase Brix levels and nutrition in pastures leading to healthier stock and greater weight gains.

  • Orchards & Vineyards

    Strengthen trees, improve fruit set, increase yield and combat surface diseases.

  • Market Gardens

    Promote faster growth, higher Brix levels and improved nutritional value in produce.

  • Broadacre Crops

    Support more efficient nutrient uptake to enable reduced synthetic inputs, increased germination rates, improved stalk strength.

  • Soil Restoration Projects

    Rebuild degraded soils, increase microbe populations and humus levels and improve water retention.

  • Horticulture

    Improve fruit set, increase yield and combat surface diseases.

Frequently Asked Questions

What's the difference between Worm Juice and leachates?

Worm Juice is a concentrated liquid extracted from premium worm cast put through a brewing process that extracts and multiples the beneficial microbes. Leachates tend to be less concentrated, obtained by passing water through a worm farm, with variable microbial content.
When do I add nutrients to the Worm Juice?

Only add/mix your nutrients in the spray tank as you’re heading out the farm gate. The microbes will begin to consume the nutrients and multiply, drawing down on the dissolved oxygen - this is why we want to avoid mixing and storing for periods of time.
Is there a withholding period?

No, Worm Brew does not require withholding periods.
What is the shelf life?

Worm Brew is shelf stable for 3 months. This period can be extended by adding a cheap air stone to the container to prolong dissolved oxygen levels. We're working on prolonging this while maintaining are exceptionally high microbial levels.

Will Worm Juice Clog sprayers?

Our Worm Brew is filtered to 200 micron. We have not had any issues with clogging equipment. For a specific filtering requirement, give us a call on 07 3195 6969.
Is your worm cast extract the same as the liquid that comes from the bottom of a worm farm?

No, our Worm Cast Extract (‘worm juice’ in Aussie slang) is not the liquid that drains from the bottom of your worm farm. That liquid is referred to as ‘leachate’. Leachate is simply excess moisture drained through the habitat from inputs and watering. While leachate may likely contain beneficial microbes, it has also possibly passed through decomposing matter and may contain microbes that are not so beneficial (particularly if the liquid has been allowed to become anerobic). Therefore, we don’t recommend applying leachate to edible gardens, but it can be applied to ornamental gardens, lawns etc.

The real ‘gold’ is the worm cast and the amazing diversity of beneficial microbes, enzymes & growth promoters that come with it. When we prepare our commercial Worm Cast Extract we age, aerate and ‘feed’ the microbes in our worm cast to maximise beneficial microbes, particularly mycorrhiza fungi. We then utilise a proprietary method of extraction to harvest the microbes, fulvic acids, humates and nutrients into a pure rainwater solution for our farmers and gardeners.

If you have castings from your own worm farm, you can put a few handfuls of cast into a watering can, top up with rainwater, stir vigorously and then treat your vegetables and plants with an amazing elixir.
How to store your Worm Juice?

Store in a dark shed, away from direct sunlight.
What are the benefits of your worm cast extract?

Worm cast extract feeds the soil with beneficial microbes required for a healthy soil food web. It works with nature to build a healthy ecosystem, not against it like chemical fertilisers.  Worm cast extract is 100% organic, safe and natural.  Some of the benefits include: 

  • Improved soil structure and aeration
  • Increased yields
  • Improved plant health & increased growth
  • Disease suppression & resistance
  • Improved water holding capacity
  • Increased nutrients in vegetables (better for the plants, better for you!)
What is the suggested application rate for your worm cast extract?

For domestic use the suggested dilution rate is between 5-20%. Our user guidelines (provided with purchase) outlines suggested application rates.

As a general rule for agricultural or commercial use, the suggested application rates are between 5-15L per hectare. If you require advice on the application rates for your specific crop and purpose please call for a chat with our technical experts.