fermented plant juice fertilizer Fruit & Flower

🌸 Fermented Fruit Juice (FFJ), Made on Our Farm

Fermented fruit juice, known across Korean Natural Farming as FFJ, is the input you reach for when your plants shift from growing leaves to making flowers and fruit. We slow-ferment ripe fruit to draw out the phosphorus and potassium that flowering and fruiting demand, along with the natural enzymes and beneficial microbes that come with a living, fermented input. The result is a bloom and fruit booster your plants can take up quickly through their leaves or roots.

Timing is the whole game with FFJ. Through early growth, plants want nitrogen for leaves, but the moment flower buds form, the demand swings hard toward phosphorus and potassium for blossoms, fruit set, and ripening. That is exactly when a foliar feed of fermented fruit juice pays off: more blooms, better fruit set, and fuller, sweeter fruit. For the full picture, see our complete guide to using Fruit & Flower FFJ.

We make this on our own farm in Colorado, and it is part of the input regimen that helped our soil reach a Haney Soil Health Score of 25.4, a number that surpasses the soil biology measured in pristine forest land. We farm soil-first because we believe healthier, more biologically alive soil grows stronger, more productive plants, and our fermented inputs are part of how we get there. You can read the full story of how we built I·M·POSSIBLE Farm.

One 8 oz bottle goes a long way: at one teaspoon per gallon it makes 48 gallons of finished spray. To see how FFJ fits with the other inputs through the season, our master guide to KNF inputs maps the whole calendar.

Product Details

Pair it with FPJ for leafy growth, or run the whole system with our Ultimate KNF Starter Pack.

🌼 Frequently Asked Questions

What does fermented fruit juice actually do for my plants?

Fermented fruit juice feeds the flowering and fruiting stage. As plants move from growing leaves to setting buds, their demand shifts toward phosphorus and potassium, and that is exactly what we draw out of ripe fruit through fermentation, along with natural enzymes and beneficial microbes. We use it to push more blooms, stronger fruit set, and fuller, sweeter fruit.

When should I switch from FPJ to FFJ?

We use fermented plant juice through leafy, vegetative growth, then switch to fermented fruit juice the week the first flower buds appear. From there we keep applying FFJ right through flowering and fruiting. The simple rule we follow: leaves love FPJ, flowers and fruit love FFJ.

Can I just ferment my own fruit for this?

You can, and we love that Korean Natural Farming is built to be shared. What you get from us is the exact fermented fruit juice we make on our own farm in Colorado, the same one that helped build soil with a Haney Soil Health Score of 25.4. It comes ready to dose at one teaspoon per gallon, so you can skip the sourcing, fermenting, and straining and put it straight to work when your plants start to bud.

How do I dilute it, and how far does one bottle go?

Mix one teaspoon into one gallon of water, which is about a 1:750 dilution. At that rate the 8 oz bottle makes 48 gallons of finished spray. Apply it as a light foliar mist or a soil and root drench in the early morning or evening, and you can combine it with other KNF inputs in the same routine.