Heavy-duty TeaLAB extract bag made from 400 micron nylon mesh and climbing-grade binding, designed for making high-quality compost and vermicast extracts. Durable, reusable, and built to last.
A robust, reusable extraction tool designed for serious gardeners, growers, and soil biology enthusiasts.
Perfect for use in compost extract or tea brewers with included carabiner clip for easy suspension.
Available in two sizes:
Small (23 × 36 cm) – makes approx. 20L
Large (51 × 56 cm) – makes approx. 60–200L (or more in staged batches)
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The TeaLAB Extract Bag is a professional-grade tool designed for producing high-quality compost extract and vermicast extract at home or on-farm scale. Constructed from 400 micron nylon mesh with climbing-grade binding, this bag is engineered for strength, durability, and repeated heavy use.
Each bag is hand stitched in Seattle, USA, by a specialist cut-and-sew workshop known for producing high-performance backpacking gear. This level of craftsmanship ensures a long-lasting tool that can withstand repeated loading, agitation, and brewing cycles without breaking down.
The fine mesh allows beneficial microorganisms and soluble nutrients to move into solution while keeping coarse material contained, making it ideal for brewing biological extracts that can be applied directly to soil or foliage.
The included carabiner clip allows the bag to be easily suspended in a compost tea brewer, ensuring consistent flow and aeration during extraction.
At KoruKai Herb Farm, we use extract systems like this to activate and multiply microbial life from our own compost and vermicast, helping to inoculate soil and support plant health at scale.
Sizes
Small Extract Bag: 23 cm × 36 cm (approx. 20 litres extract)
Large Extract Bag: 51 cm × 56 cm (approx. 60–200 litres extract)
For larger batches (e.g. 1000L), compost can be refreshed 3–5 times, diluted, and reused in the brewer
Special Features
Strong, durable nylon fabric with climbing-grade binding
400 micron mesh—ideal size for compost extract, allowing bacteria, fungi, protozoa, and nematodes to pass through
Includes lanyard and carabiner for easy hanging in extract or tea brewers
Built for long-term use and durability
How to use
Fill the Extract Bag about one-third full with high-quality compost or vermicast. Roll the top down 3–4 times and secure the buckle. Suspend the bag in a bucket (approximately 20L) filled halfway with unchlorinated water.
Gently rub and agitate the bag in the water to release microbial life and soluble nutrients into solution, creating a rich compost extract. For a stronger brew, repeat the process using fresh compost in the same water or a new batch.
Once ready, dilute and apply as a soil drench or foliar spray over your garden or crops. Optional additions such as fish hydrolysate or liquid seaweed extract can be included just before application to further enhance plant and soil response.
At KoruKai Herb Farm, we consider compost extract to be a more reliable and cost-effective approach than traditional aerated compost tea systems. Extracts maintain a broader microbial diversity and are simpler to produce at scale using only a bucket and an extract bag. This avoids the complexity of maintaining strict aerobic conditions required in compost tea brewing, which can be difficult without specialised equipment and microscopy skills.
However, if you do wish to make compost tea, these bags are also well suited for that purpose.
We recommend familiarising yourself with the process before use. The TeaLAB USA website provides helpful videos and additional guidance.
Please refer to the video below for instructions on how to use, clean, and apply your compost extract.
A compost thermometer is an essential tool for successful hot composting and worm farming, whether in a home garden or commercial setup.
It provides a clear indication of microbial activity inside your compost pile, helping you determine when to turn it and whether your carbon-to-nitrogen balance is working correctly. Temperature readings quickly show if your mix contains too many “greens” (too hot), too many “browns” (too cold), or insufficient moisture (low microbial activity).
Without temperature monitoring, composting becomes guesswork—this tool allows you to refine your process and consistently produce high-quality compost over time.
Made from stainless steel with a long probe designed to reach deep into compost piles and soil.
ComposTex Compost Cover (compost fleece) is a breathable, UV-resistant fabric designed to protect compost piles and windrows while still allowing oxygen flow for healthy decomposition. It sheds rain and snow melt while maintaining ideal aerobic conditions.
At KoruKai Herb Farm, we also use it for simple, low-tech worm farming systems directly on the ground.
Available sizes (please choose below): 1.20m x 1.20m 1.20m x 2.40m 1.20m x 3.66m
For different sizes, large quantities or a whole 50m roll (3.66m width) please send an email to Kai at [email protected] for a quote. We can supply any length required.
We can do any length you require and the width will be 3.66 metres.
This cover crop seeds or green manure seeds mix has been blended to achieve maximum benefit. It can help with common challenges such as compaction, weed pressure, pests and diseases, low fertility, leaching and erosion.
Best sown between January/February and April/May, depending on your climate. This diverse mix maintains living soil cover in areas that would otherwise be bare over winter. This mix contains seeds from 5 plant families as well as legumes (nitrogen fixing plants), which has been proven in field trials to be very beneficial to build soil structure and to increase beneficial microbes in the soil.
ComposTex Compost Cover (compost fleece) is a breathable, UV-resistant fabric designed to protect compost piles and windrows while still allowing oxygen flow for healthy decomposition. It sheds rain and snow melt while maintaining ideal aerobic conditions.
At KoruKai Herb Farm, we also use it for simple, low-tech worm farming systems directly on the ground.
Available sizes (please choose below): 1.20m x 1.20m 1.20m x 2.40m 1.20m x 3.66m
For different sizes, large quantities or a whole 50m roll (3.66m width) please send an email to Kai at [email protected] for a quote. We can supply any length required.
We can do any length you require and the width will be 3.66 metres.
This amazing guide brings together what we have learnt, observed and experienced over the last 12 years of managing several worm farms to get amazing worm castings for our farm and vegetable gardens.
In this guide, with 70 pages, you will learn how to turn food scraps and farm waste into rich compost and fertiliser to regenerate soil and bring back life force to the below ground livestock - the microbes. This turns on nutrient cycling, grows resilient and healthy plants and increases the water holding capacity of soil - a necessity with droughts and flooding that go hand in hand nowadays.
Healthy soil is the backbone of health - be it environmental, animal, plant or human health. It's our foundation and the solution to a lot of our problems.
A specially formulated blend designed to support a thriving worm farm ecosystem. It provides essential nutrients, calcium, grit, carbon, and trace elements to keep your worms active and productive.
Made with lime, humates, seaweed, and biochar, this blend helps balance pH, enhance beneficial fungi, and improve nutrient retention for healthier, more efficient composting.
Available in 500g and 1kg bags (please select below).
This cover crop seeds or green manure seeds mix has been blended to achieve maximum benefit. It can help with common challenges such as compaction, weed pressure, pests and diseases, low fertility, leaching and erosion.
Best sown between August/September and December/January, depending on your climate.
This diverse mix maintains living soil cover in areas that would otherwise be bare. This mix contains seeds from 8 plant families as well as legumes (nitrogen fixing plants), which has been proven in field trials to be very beneficial to build soil structure and to increase beneficial microbes in the soil.
A compost thermometer is an essential tool for successful hot composting and worm farming, whether in a home garden or commercial setup.
It provides a clear indication of microbial activity inside your compost pile, helping you determine when to turn it and whether your carbon-to-nitrogen balance is working correctly. Temperature readings quickly show if your mix contains too many “greens” (too hot), too many “browns” (too cold), or insufficient moisture (low microbial activity).
Without temperature monitoring, composting becomes guesswork—this tool allows you to refine your process and consistently produce high-quality compost over time.
Made from stainless steel with a long probe designed to reach deep into compost piles and soil.
Worms will be available again in August. During the wet and cold winter months, separating the worms from the castings becomes too unpleasant. Sign up below to get an email once they are back in stock.
Composting worms turn food scraps and garden waste into rich, nutrient-dense vermicast—helping regenerate soil, support beneficial microbes, and improve nutrient cycling. This creates healthier, more resilient plants and increases soil water-holding capacity, an important benefit in times of drought and heavy rainfall.
You will receive 250g (approx. 1,000 worms) or 500g (approx. 2,000 worms), supplied with moist bedding in a breathable perforated bag. Worms arrive in a mix of ages and sizes and will quickly breed and multiply under suitable conditions.
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