Comparison: Best Ground Fish Fertilizer (Updated | Dec 1st)
If you’re looking to give your garden a natural boost, you’ve probably heard about ground fish fertilizer—but with so many options out there, how do you know which one’s truly the best? We’ve dug into the details, tested the top contenders, and compared ingredients, effectiveness, and value so you don’t have to. Whether you’re growing veggies, flowers, or lush greenery, the right fish-based fertilizer can make all the difference.
1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
Yield-Boosting Emulsion
- Best for protein-packed liquid: Just Scentsational Bare Ground Solutions TP-128G Trident’s Pride Organic Liquid Fish Hydroponic Soil Fertilizer
- Best for compact protein boost: Just Scentsational Bare Ground Solutions TP-64G Trident’s Pride Organic Liquid Fish Hydroponic Soil Fertilizer
- Best for granule-ready formula: Just Scentsational Bare Ground Solutions TP-128G Trident’s Pride Organic Liquid Fish Hydroponic Soil Fertilizer
- Best for all-purpose 5-1-1: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for vitamin-rich blend: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for yield-boosting emulsion: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for root-strengthening formula: Fertilome (10612) Fish Emulsion Fertilizer 5-1-1 (32 oz)
- Best for deodorized wintergreen blend: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for fish & kelp fusion: GS Plant Foods Liquid Fish & Kelp Fertilizer (1 Gallon) – Organic Material Review Institute Listed Natural Plant Food for Home Gardens
- Best for odorless protein power: Neptune’s Harvest Fish Fertilizer 2-4-1
Product Comparison: Best Ground Fish Fertilizer
Just Scentsational Bare Ground Solutions TP-128G Trident’s Pride Organic Liquid Fish Hydroponic Soil Fertilizer, 128 oz (1 Gallon)
- Omri-rated, all-natural, Organic fish fertilizer adds proteins and enzymes to soil
- Increases anti-oxidants, sugar, and earthworm population
- Increased microbe production reduces the need for pesticides and creates stronger growth
- Comes in liquid fertilizer or soil conditioning granules for easy application
- Suggested use is 4-6oz per gallon of water.
Just Scentsational Bare Ground Solutions TP-64G Trident’s Pride Organic Liquid Fish Hydroponic Soil Fertilizer, 64 oz (2 Quarts)
- Omri-rated, all-natural, Organic fish fertilizer adds proteins and enzymes to soil
- Increases anti-oxidants, sugar, and earthworm population
- Increased microbe production reduces the need for pesticides and creates stronger growth
- Comes in liquid fertilizer or soil conditioning granules for easy application
- Suggested use is 4-6oz per gallon of water.
Just Scentsational Bare Ground Solutions TP-128G Trident’s Pride Organic Liquid Fish Hydroponic Soil Fertilizer, 128 oz (2 Pack)
- Omri-rated, all-natural, Organic fish fertilizer adds proteins and enzymes to soil
- Increases anti-oxidants, sugar, and earthworm population
- Increased microbe production and creates stronger growth
- Comes in liquid fertilizer or soil conditioning granules for easy application
- Suggested use is 4-6oz per gallon of water.
Alaska Fish Fertilizer OMRI Listed 5-1-1, 115 oz
- Fish-based fertilizer for use in vegetable, fruit, and flower gardens
- Excellent for use on flowers, trees, and other plants
- OMRI listed
- For organic gardening
- Great for all indoor and outdoor plants
- NPK 5-1-1 fish emulsion fertilizer
- Fish has been used as a natural source of plant nutrients for centuries
- Easy to use, just mix with water
CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer, 1 Quart
- Promotes healthy plant growth with 11 vitamins
- Can be used on all indoor and outdoor plants
- 100-percent organic
- Stimulates microorganisms
- Does not burn
1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants, Flowers, Fruits & Vegetables, 2-3-1 NPK – Sustainably Sourced and Hydrolyzed for Steady Growth
- ORGANIC FISH EMULSION FERTILIZER – Our liquid fish fertilizer is made from sustainably sourced fish emulsion and we use up all the parts that would otherwise go to waste. Using an environmentally conscious method, ingredients are refined fresh and 100% cold pressed to help retain all of the nutrients, vitamins, and amino acids needed to grow healthy plants.
- GROW PLANTS NATURALLY – This wonderfully organic alternative to synthetic fertilizer contains a 2-3-1 NPK ratio perfect for light and frequent applications. Promotes steady, healthy plant development throughout the growing season.
- ENRICHES SOIL – Helps build a strong foundation for your organic garden to thrive on! Use as an effective soil drench to improve fertility, structure, and encourage the growth of beneficial microorganisms like fungi in your garden’s soil.
- PRODUCE MORE – Get the most out of your fertilizer and your garden! This organic garden fertilizer helps to increase crop yields and flower blooms. Gentle enough to use as a foliar spray makes this the perfect fish fertilizer for plants, flowers, and vegetables.
- SMELL THE DIFFERENCE – This fertilizer smells like fish because it’s made from fish! Crafted with high-quality concentrated and undiluted hydrolyzed fish emulsion each bottle gives off a pungent fishy aroma. When compared, we see it like this – if it doesn’t smell, then it’s not real fish!
Fertilome (10612) Fish Emulsion Fertilizer 5-1-1 (32 oz)
- Develops deep green foliage, vigorous root systems and a solid plant structure
- Derived from fish soluble, can be used from indoor and outdoor. Can be used on plants and trees.
- Mixes with water and can be used by any convenient method of application. Shake well before use.
- 5-1-1 Fertilizer contains 5% Nitrogen, 1% Phosphate and 1% Soluble Potash.
- For plants mix 1-2 tbsp per 1 gal of water. For trees mix 4 tbsp per gal of water.
Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Will Not Burn
- Great for all plants
- Deodorized with Natural Wintergreen
- 5-1-1 fertilizer is an excellent source of organic plant nutrients
- Fish Fertilizer
GS Plant Foods Liquid Fish & Kelp Fertilizer (1 Gallon) – Organic Material Review Institute Listed Natural Plant Food for Home Gardens, Lawns, and Vegetables
- ORGANIC MATERIALS REVIEW INSTITUTE LISTED FOR TRUSTED GARDEN CARE Certified by OMRI for use in organic growing, GS Plant Foods Liquid Fish & Kelp Fertilizer delivers reliable, natural nutrition for vegetables, lawns, flowers, and shrubs.
- SEA-AND-SOIL BASED NUTRITION Made from North Atlantic seaweed (Ascophyllum nodosum) and fresh fish hydrolysate, this liquid concentrate provides essential nutrients and trace minerals that help support healthy soil and plant development.
- IMPROVES SOIL MICROBIOLOGY & NUTRIENT UPTAKE Supports a thriving soil ecosystem that promotes strong root systems and efficient nutrient absorption — the foundation for resilient, productive plants.
- EASY-TO-USE CONCENTRATE FOR ALL PLANTS Mix 2 oz per gallon of water and apply as a foliar spray or soil drench every 2–4 weeks. Safe for use on vegetables, fruits, ornamentals, turf, and houseplants.
- MADE IN THE USA – SUSTAINABLY PRODUCED Proudly produced by GS Plant Foods as a licensed fertilizer manufacturer. No synthetic chemicals, additives, or fillers — just natural ingredients formulated for healthy home gardens and hobby farms.
Neptune’s Harvest Fish Fertilizer 2-4-1, 18 Ounce
- Neptune’s Harvest is an organic fertilizer made from fresh north Atlantic fish
- It is made by a unique cold process that protects the vitamins, amino acids, enzymes and growth hormones
- It also contains all the micro and macro nutrients naturally found in fish
- Unlike fish emulsions, Neptune’s Harvest retains the fish proteins and oils and has no unpleasant odor
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Buying Guide
FAQs
What should I look for when choosing a fish fertilizer?
First, check the NPK ratio; a 5-1-1 or 2-3-1 ratio indicates a balanced source of nitrogen, phosphorus, and potassium for foliage and root growth. Next, verify if the product is OMRI‑listed, which guarantees it meets organic gardening standards. Finally, consider the form (liquid, granule, or emulsion) and the concentration, as these affect application frequency and ease of use.
How do liquid fish fertilizers compare to granule or emulsion options?
Liquid fertilizers, like the Just Scentsational TP‑128G, dissolve quickly and are ideal for foliar sprays or soil drenches, providing rapid nutrient uptake. Granules or emulsions, such as the Central Garden Brands Fish Emul, release nutrients more slowly, reducing the risk of over‑feeding and are easier to store without dilution. Choose liquids for fast results and granules for low‑maintenance, long‑term feeding.
Is the OMRI listing important for my garden?
Yes, an OMRI‑listed product, such as Alaska Fish Fertilizer or GS Plant Foods Liquid Fish & Kelp, is certified safe for organic production and typically free of synthetic chemicals. This certification also reassures you that the fertilizer meets strict environmental standards, which can be crucial for certified organic farms or eco‑conscious gardeners.
Which product offers the best value per ounce?
When comparing price‑to‑volume, the 1‑gallon containers (e.g., the 1 Gallon Organic Fish Emulsion or Alaska Fish Emulsion 5‑1‑1) generally provide the lowest cost per ounce. Larger bulk sizes also reduce the frequency of repurchasing, making them more economical for extensive gardens or repeated seasonal use.
How do I decide between a high‑nitrogen (5‑1‑1) versus a lower‑nitrogen (2‑3‑1) formula?
A high‑nitrogen 5‑1‑1 blend, like Fertilome or Alaska Fish Emulsion, promotes vigorous leaf and stem growth, making it ideal for leafy vegetables and fast‑growing annuals. A lower‑nitrogen 2‑3‑1 mix, such as the 1 Gallon Organic Fish Emulsion, provides a more balanced nutrient profile that supports flowering and fruiting, suitable for bloom‑heavy plants and fruit crops.
Will the fertilizer burn my plants if I over‑apply?
Most of the listed products, including Central Garden Brands Fish Emul and Alaska Fish Emulsion, are formulated to be gentle and non‑burning when used at the recommended dilution rates. However, exceeding the suggested concentration—especially with concentrated liquids—can still cause leaf scorch, so always follow the label directions.
Do any of these fish fertilizers have a reduced odor?
Alaska Fish Emulsion 5‑1‑1 Concentrate is deodorized with natural wintergreen, offering a milder scent compared to traditional fish emulsions. Neptune’s Harvest also claims a low‑odor profile thanks to its cold‑process extraction, while most other products retain a noticeable fish smell, which is a sign of authentic fish content.
Can I use these fertilizers for indoor plants?
Yes, many of the products, such as Central Garden Brands Fish Emul and GS Plant Foods Liquid Fish & Kelp, are safe for indoor use because they are 100 % organic and free of harsh chemicals. Just be sure to dilute them properly and apply in a well‑ventilated area to minimize any lingering fish odor.