Tamborine Mountain, QLD · Fermented Fresh On-Farm
Probiotic Plant Tonics for
Living Soil
Fermented Plant Extracts powered by EM-1(R) microbes and nutrient-dense botanicals.
Build long term resilience in your garden the way nature intended.
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Fermented Insect Frass Extract – Bio-Inoculant & Plant Immunity Booster
Regular price From $12.00Regular price$24.00Sale price From $12.00Sale -
Fermented Organic Bull Kelp Extract
Regular price From $14.00Regular priceSale price From $14.00 -
Fermented Organic Comfrey Extract
Regular price From $11.00Regular priceSale price From $11.00 -
Fermented Organic Pumpkin Extract
Regular price From $11.00Regular priceSale price From $11.00 -
Lactic Acid Bacteria (LAB) Serum
Regular price From $11.00Regular priceSale price From $11.00 -
Probiotic Soil Tonic Concentrate
Regular price From $13.00Regular priceSale price From $13.00
Why FPE works
6 Reasons Your Garden Will Thank You
From the first application, you're investing in long-term garden health — not just quick-fix nutrition.
Which FPE Do You Need?
Commercial performance, without the lab overhead
Every plant has different needs at different times. Use this guide to pick the right tonic for your garden goals.
Which FPE Do You Need?
Every plant has different needs at different times. Use this guide to pick the right tonic for your garden goals.
| Your Goal | Recommended Tonic | Key Action | Best For |
|---|---|---|---|
| Boost flowers & fruit | 🌻 Fermented Comfrey Extract | High in potassium & minerals for reproductive growth | Tomatoes Roses |
| Recover stressed plants | 🌊 Fermented Seaweed Extract | Packed with hormones for heat, frost & transplant recovery | All plants Seedlings |
| Lush, green leaves | 🎃 Fermented Pumpkin Extract | Rich in nitrogen & enzymes for rapid vegetative growth | Leafy greens Herbs |
| Fix "dead" or compacted soil | 🧪 Probiotic Soil Tonic (EM-1) | Ultimate probiotic reset for tired beds, pots, or clay | New beds Lawns |
| Boost pest & disease resistance | 🐛 Fermented Insect Frass Extract | Chitin activates SAR — systemic acquired resistance | Vegetables Orchards |
| Supercharge compost & bokashi | 🦠 Lactic Acid Bacteria (LAB) Serum | Drives fermentation & nutrient cycling in compost systems | Compost Bokashi |
"Because these are true living ferments, they carry a distinct earthy, pickled aroma. This is the scent of active lactic acid bacteria — the same beneficial microbes found in yogurt and kombucha. It's not a flaw; it's proof of life.— Kai Kai Farm, Tamborine Mountain QLD
Once diluted and watered in, it disappears — leaving only the biological benefit behind."
How to use
Simple to Use, Impossible to Overdo
FPEs are designed for beginners and experienced growers alike. Always dilute before use. You literally cannot use too little.
Choose Your Tonic
Select based on your goal — see the guide above, or start with our Probiotic Soil Tonic for everything.
Dilute in Water
Always dilute your FPE before applying. Never apply undiluted concentrate directly to plants or soil.
Apply to Soil or Leaves
Water into the root zone, or use a sprayer for foliar applications. Early morning or late afternoon is ideal.
Apply Regularly
Every 2–4 weeks during active growth. Consistency matters more than strength — gentle & regular wins.
Common questions
New to fermented plant extracts? These are the questions we hear most from our customers.
Everything you need to know before ordering. Still unsure? Email hello@kaikaifarm.au
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What exactly is a Fermented Plant Extract?
An FPE is a liquid concentrate made by fermenting fresh plant material — comfrey, seaweed, pumpkin, herbs — with a sugar source and beneficial microbes like Lactic Acid Bacteria (LAB) or EM-1. The fermentation process breaks down plant matter, making nutrients, enzymes, and growth compounds bioavailable to your garden plants and soil biology.
Are FPEs the same as liquid fertilisers?
No — they work very differently. Standard liquid fertilisers deliver soluble nutrients directly to plants. FPEs feed and stimulate your soil's microbial ecosystem, which in turn unlocks nutrients naturally. FPEs also deliver plant growth hormones, enzymes, and beneficial microbes that fertilisers simply don't contain.
Why do they smell? Is that normal?
Mushroom mycelium is a living organism. Extended time in transit — especially in warm Australian conditions — can stress or damage the colonised block. Express post minimises exposure to heat and dramatically improves the condition of blocks on arrival. Add the Express Post Addon product with a matching quantity when ordering.
Can I use these on vegetables and food gardens?
Absolutely. Our FPEs are 100% organic, chemical-free, and non-toxic. They are widely used in organic vegetable gardens, permaculture systems, and natural farming. Apply to soil or as a foliar spray — just maintain the recommended dilution ratios and avoid applying to produce right before harvest.
How soon will I see results?
FPEs work cumulatively, not instantly. Many growers notice improved leaf colour and recovery from stress within 2–4 weeks of regular use. The biggest benefits — improved soil structure, increased resilience, and richer harvests — build over a full season. Unlike synthetic fertilisers, you're building biological wealth, not borrowing against it.
How do I know which product to start with?
For absolute beginners, our Probiotic Soil Tonic Concentrate or Comfrey Fermented Extract is the ideal starting point — it works on everything. If you want to target a specific outcome, use our product guide above: Seaweed for stressed plants, Pumpkin for fruiting and growth, and Frass for pest resistance.
Can I combine different FPEs together?
Yes! FPEs combine beautifully with each other and with other microbial inputs like EM-1 Bokashi liquid or compost teas. Many experienced growers rotate between products — for example, Seaweed one week and Comfrey the next. Just avoid mixing with synthetic chemicals or chlorinated tap water (let it sit 24 hours first).
How long does a bottle last?
Because these are concentrated — diluted at 1:500 to 1:1000 — a single litre goes an incredibly long way. One litre makes up to 1,000 litres of ready-to-use tonic. For a typical home garden applying fortnightly, one bottle can last an entire growing season. Store in a cool, dark place and use within 12 months of opening.
Are these safe around pets and children?
Yes. Our FPEs are 100% non-toxic and chemical-free. They are safe for pets, children, bees, butterflies, earthworms, and all beneficial garden life. We use the same products on our own farm at Tamborine Mountain where our family and animals live and work daily.
What is EM-1 and why do you use it?
EM-1 (Effective Microorganisms) is a consortium of beneficial microbes — Lactic Acid Bacteria, yeasts, and phototrophic bacteria — developed by Japanese microbiologist Dr Teruo Higa. We use it as both a fermentation catalyst and a soil probiotic. It drives the fermentation of our plant extracts AND inoculates your soil with biology that improves structure, nutrient cycling, and long-term fertility.
Why Kai Kai Farm




