What Is Fish Brew Organic Fish Hydrolysate and How Does It Work?
At Fish Brew, we are committed to creating products that support both thriving plants and thriving soils. One of our flagship offerings—Fish Brew Organic Fish Hydrolysate—does exactly that.
Unlike conventional fertilizers that focus solely on feeding nutrients to plants, our hydrolysate provides bioavailable nutrition to plants and fuels the soil microbiome, promoting long-term health and resilience.
Let’s take a closer look at what it is, how it works, and why it can make a powerful difference in your growing system.
🌊 What Is Fish Hydrolysate?
Fish hydrolysate is a liquid fertilizer made from whole ground fish that are digested using naturally occurring enzymes and stabilized with a small amount of phosphoric acid. This cold enzymatic process preserves the fats, oils, amino acids, and nutrients that are often destroyed in heat-treated fish emulsions.
At Fish Brew, we source our hydrolysate fish directly from our sustainable aquaculture farms across New England. Any fish that do not go to market are repurposed into hydrolysate as part of our zero-waste, circular approach to resource use.
Because our fish are raised in controlled environments, we can guarantee purity:
- No heavy metals
- No PCBs
- No PFAS
- No risk of contamination from unknown wild sources
This results in a clean, traceable, and nutrient-rich product for your plants and soil.
🧪 What’s Inside?
Fish Brew Organic Fish Hydrolysate is naturally packed with:
- Macro- and micronutrients
- Fish-derived amino acids
- Natural oils and fats
- Beneficial microbial support
📊 NPK Value: 2-3-0.24
Our fish hydrolysate carries an NPK rating of 2-3-0.24:
- 2% Nitrogen (N) – Supports leafy green growth and feeds soil microbes
- 3% Phosphorus (P) – Encourages strong root development and flowering
- 0.24% Potassium (K) – Boosts plant immunity and stress tolerance
While the NPK may appear modest, the bioavailability of these nutrients makes a big impact. Plants and microbes absorb them more efficiently, and the soil food web is recharged with every application.
🔬 The Power of Fats, Oils & Amino Acids
What makes Fish Brew Hydrolysate special is its whole-fish composition, which retains elements that many other products remove.
🌱 Fish Amino Acids

Fish-derived amino acids:
- Improve nutrient uptake
- Act as natural chelators, helping plants absorb minerals
- Increase plant resilience to drought, pests, and disease
🧴 Natural Fats and Oils
Our hydrolysate keeps all the beneficial oils and fats intact:
- Act as a slow-release carbon source for microbes
- Encourage a fungal-dominant soil food web, ideal for perennials and trees
- Help improve soil structure and moisture retention
🌿 Fuel for Microbial Life
Fish Brew Organic Fish Hydrolysate is more than a fertilizer—it is food for beneficial microbes, which are essential to healthy soil and plants.
These microbes:
- Break down organic matter
- Cycle nutrients back into plant-available forms
- Outcompete pathogens
- Build soil structure over time
🧪 How to Use It
Fish Brew Hydrolysate is versatile and easy to apply in a wide range of settings:
- Foliar Feed: Dilute and spray directly onto leaves
- Root Drench: Water into the soil around plants
- Compost Tea or Inoculants: Blend as a microbial booster
- Plant Stages: Apply during vegetative growth, flowering, or transplanting
General Applications: Mix hydrolysate container thoroughly by shaking and dilute 1-3 oz of fish hydrolysate with one gallon of water.
🌎 Why Choose Fish Brew Organic Fish Hydrolysate?
✔ Made from clean, traceable fish
✔ Whole-fish formulation—nothing wasted
✔ Retains oils, fats, and amino acids
✔ Safe, sustainable, and fully transparent production process
✔ Supports plants, microbes, and long-term soil health
With Fish Brew Organic Fish Hydrolysate, you are not just fertilizing—you are healing your soil, feeding your microbes, and powering your plants from the ground up.