fermented plant juice hydroponics Fermented Plant Juice (FPJ) Growth

🌿 Fermented Plant Juice (FPJ), Made on Our Farm

Fermented plant juice, known across Korean Natural Farming as FPJ, is the input that drives strong, leafy, vegetative growth. We slow-ferment the vigorous young growing tips of fast-growing plants to draw out their natural plant growth hormones, enzymes, and beneficial microbes, then deliver them in a form your plants take up fast through leaf or root. The result is sturdier stems, lush foliage, and vigorous root development in the green-growth phase.

Every plant has a leafy push before it ever sets a flower, and that is FPJ's moment. Through vegetative growth, plants want nitrogen and growth signals to build frame and foliage, and a weekly foliar feed of fermented plant juice supports exactly that. We keep applying it right up until the first flower buds form, then hand off to fermented fruit juice for the bloom. For the full method, see our complete guide to using GROWTH FPJ.

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 resilient 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 FPJ fits with the other inputs across the season, our master guide to KNF inputs maps the whole calendar.

Product Details

When buds form, hand off to FFJ for flowering and fruit, or run the whole system with our Ultimate KNF Starter Pack.

🌼 Frequently Asked Questions

What does fermented plant juice actually do for my plants?

Fermented plant juice powers the leafy, vegetative stage. We ferment the vigorous young growing tips of fast-growing plants to capture their natural plant growth hormones, enzymes, and beneficial microbes, and your plants take that up to build stronger stems, fuller foliage, and healthier roots. We reach for it whenever a plant is in its green-growth push, before it turns its energy toward flowers.

When in the season should I use FPJ?

We apply it weekly all through vegetative growth, from young transplants up until the first flower buds appear. The week buds form, we switch over to fermented fruit juice for blooming and fruiting. The simple rule we follow: leaves love FPJ, flowers and fruit love FFJ.

Can I just make my own fermented plant juice?

You can, and we love that Korean Natural Farming is built to be shared. What you get from us is the exact fermented plant 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 harvesting tips, fermenting, and straining and put it straight to work.

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.