Fermented Fish Amino Acids — KNF Recipe

A fermented fish-based nitrogen and amino acid source that provides rapidly available nutrition to plants and soil microbes. FFA is rich in free amino acids, proteins, and beneficial enzymes, making it an excellent nitrogen supplement during vegetative growth.

A fermented fish-based nitrogen and amino acid source that provides rapidly available nutrition to plants and soil microbes. FFA is rich in free amino acids, proteins, and beneficial enzymes, making it an excellent nitrogen supplement during vegetative growth. This KNF preparation is made with fresh fish scraps (heads, guts, bones) or whole small fish – 2 parts by weight and is a staple input in regenerative Korean Natural Farming — feeding soil biology instead of relying on synthetic fertilizers. It is one of 50+ free recipes we use daily at the IC SPICY nursery in Port Charlotte, Florida.

Ingredients

• Fresh fish scraps (heads, guts, bones) or whole small fish – 2 parts by weight
• Brown sugar – 1 part by weight
• Optional: makgeolli or rice wine – small amount to inoculate fermentation

Steps

1. Collect fresh fish material. The fresher the better — avoid salt-preserved fish.
2. Chop fish material into small pieces to maximize fermentation surface.
3. Layer fish and brown sugar alternately in a clay pot or bucket at a 2:1 ratio (fish to sugar).
4. Mix well, cover with breathable cloth, and press down with a weight to keep material submerged as liquid forms.
5. Ferment at room temperature for 14–21 days, stirring every 2–3 days.
6. The liquid will become dark brown and rich-smelling (strong but not rancid).
7. Strain through fine mesh, pressing out as much liquid as possible from the solids.
8. Store strained liquid in a sealed glass jar. Add a small amount of brown sugar to extend shelf life.

Common questions

How long does Fermented Fish Amino Acids take to make?

Timing depends on temperature and humidity — follow the step-by-step schedule in the recipe above. Fermented and cultured inputs improve with proper timing, so avoid rushing stages.

When should I apply a KNF input like this?

Match the input to the plant's growth stage, per Master Cho's nutritive cycle theory: vegetative-stage plants favor growth inputs like FPJ and FAA, while flowering and fruiting plants favor WCA and FFJ. Apply early morning or late evening, and never in strong midday sun.

Is this safe for organic or no-spray gardens?

Yes — like all IC SPICY CookBook recipes, this uses only biological and food-grade ingredients with zero synthetic fertilizers or pesticides. Always label your jars, use clean tools, and do a small test application before treating every plant.