Comparison: Best 1 Gallon Fish Fertilizer (Updated | Dec 1st)
But with so many options out there, how do you know which one delivers the best results? We’ve tested and compared the most popular brands—checking nutrient content, smell, ease of use, and real garden performance—so you don’t have to guess.
- Best for burn-free wintergreen: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for cold-pressed yield: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for omri certified: Alaska Fish Fertilizer OMRI Listed 5-1-1
- 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 microbe boost: Just Scentsational Bare Ground Solutions TP-128G Trident’s Pride Organic Liquid Fish Hydroponic Soil Fertilizer
- Best for versatile 2-3-1: GS Plant Foods Liquid Fish Fertilizer – Organic Material Review Institute Listed (1 Gallon) – Natural Hydrolyzed Fish Fertilizer for Gardens
- Best for iron-rich all-purpose: Liquinox 7128 Fish Emulsion 5-1-1 Fertilizer
- Best for vitamin-packed organic: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for root-strengthening formula: Fertilome (10612) Fish Emulsion Fertilizer 5-1-1 (32 oz)
- Best for tomato power boost: Neptune’s Harvest Tomato & Veg Fertilizer 2-4-2
Product Comparison: Best 1 Gallon Fish Fertilizer
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
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!
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
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.
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.
GS Plant Foods Liquid Fish Fertilizer – Organic Material Review Institute Listed (1 Gallon) – Natural Hydrolyzed Fish Fertilizer for Gardens, Lawns & Container Growing
- Organic Materials Review Institute Listed for Organic Production Approved as GS Plant Foods Organic Liquid Fish Concentrate 2-3-1. Suitable for organic growing under OMRI and NOP standards.
- Balanced Nutrient Formula (2-3-1) Provides primary nutrients from hydrolyzed fish for sustained plant nutrition and soil health.
- Versatile Garden Use: Ideal for vegetables, lawns, flowers, shrubs, trees, fruit, and container plants when used as directed.
- Simple Application: Mix 4 oz per gallon of water for most uses. Apply generously to soil or as a foliar feed until leaves are wet.
- Florida Licensed Manufacturer: Produced by GS Plant Foods, LLC (License F003717). 1 Gallon liquid fertilizer (8.9 lb).
Liquinox 7128 Fish Emulsion 5-1-1 Fertilizer, 1-Gallon
- All purpose liquid fish fertilizer: Use on flowers, lawns, shrubs, trees, and other outdoor plants
- Primary nutrients source: Derived from seagoing fish
- Active ingredients: Includes iron, manganese, and zinc
- Fish emulsion 5-1-1: Suitable for soil or foliar application
- Safe and nonburning: Ideal for use on vegetables, flowers, shrubs, lawns, and trees
- Versatile application: Can be used on potted and house plants, fruits, vegetables, ornamentals, and shade trees
- Application rate: Recommended usage is 2 tablespoons per gallon monthly during the growing and blooming season
- Product type: Liquid fertilizer
- Package size: Available in a 1-gallon container
- Manufacturer: Liquinox
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
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.
Neptune’s Harvest Tomato & Veg Fertilizer 2-4-2, 1 Gallon
- Helps Increases Vigor And Volume Of Tomatoes And Vegetables
- Ideal For Vegetables, Trees, Shrubs And Flowers
- Nutrients Help Plants Tolerate Drought
- Pet Safe
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 N‑PK ratio should I look for in a 1‑gallon fish fertilizer?
Most fish emulsions list a 5‑1‑1 or 2‑3‑1 ratio; 5‑1‑1 provides a higher nitrogen boost for leafy growth, while 2‑3‑1 is gentler and better for frequent feeding. Choose 5‑1‑1 if you need rapid foliage development, and 2‑3‑1 if you prefer a balanced feed that supports fruiting and root health. Both ratios are organic, but the higher nitrogen version may burn sensitive seedlings if over‑diluted.
How important is an OMRI listing when buying fish fertilizer?
An OMRI (Organic Materials Review Institute) listing guarantees the product meets USDA organic standards, which is crucial for certified organic gardens. Products like Alaska Fish Fertilizer OMRI Listed 5‑1‑1 and GS Plant Foods Liquid Fish & Kelp Fertilizer carry this certification, assuring you they contain no prohibited synthetic additives. If you’re growing vegetables for market or personal organic use, prioritize OMRI‑listed options.
Do I need to worry about the fishy smell in liquid fish fertilizers?
Yes, the odor is a natural indicator of genuine fish emulsion; products that claim “no smell” often use masking agents or synthetic blends. The 1‑gallon Organic Fish Emulsion from B09FZTPQJL openly states it has a pungent fishy aroma, confirming its authenticity. If you prefer a less noticeable scent, look for deodorized formulas like Alaska Fish Emulsion with natural wintergreen.
Which 1‑gallon fish fertilizer offers the best value for money?
Value depends on nutrient density, OMRI certification, and additional ingredients. GS Plant Foods Liquid Fish & Kelp Fertilizer combines fish hydrolysate with kelp, providing extra trace minerals and a 2‑3‑1 ratio, often priced competitively for its dual‑source nutrition. For pure fish protein at a lower cost, Liquinox 7128 Fish Emulsion 5‑1‑1 delivers a strong nitrogen boost without extra additives.
How do I properly dilute a 1‑gallon fish fertilizer for different plant types?
General guidance is 2‑4 oz of concentrate per gallon of water for vegetables and annuals, while trees and shrubs can handle 4‑6 oz per gallon for a stronger feed. Products like Just Scentsational Bare Ground Solutions recommend 4‑6 oz per gallon, whereas GS Plant Foods suggests 2 oz per gallon for most applications. Always start with the lower dilution and observe plant response before increasing strength.
Can I use fish fertilizer as a foliar spray as well as a soil drench?
Yes, most liquid fish emulsions are safe for both foliar and soil applications, providing nutrients directly to leaves and enhancing root uptake. The 1‑gallon Organic Fish Emulsion from B09FZTPQJL highlights its suitability as a foliar spray, while Alaska Fish Emulsion emphasizes a non‑burning formula ideal for foliage. Ensure the solution is well‑diluted to avoid leaf scorch, especially in hot weather.
What extra benefits do fish‑kelp blends offer over pure fish emulsion?
Kelp adds natural hormones, micronutrients, and sea‑derived trace minerals that improve stress tolerance and root development. GS Plant Foods Liquid Fish & Kelp Fertilizer leverages this synergy, promoting a healthier soil microbiome and better nutrient uptake. Pure fish emulsions like Liquinox 7128 focus on nitrogen, phosphorus, and potassium, so a kelp blend can provide a more holistic boost for fruiting and flowering plants.
Is there a noticeable performance difference between 5‑1‑1 and 2‑3‑1 formulas?
A 5‑1‑1 formula delivers a higher nitrogen concentration, accelerating leaf growth and greening, which is ideal for early‑season vegetative stages. The 2‑3‑1 ratio, found in products such as the 1‑gallon Organic Fish Emulsion, supplies more phosphorus and potassium, supporting root development, flowering, and fruit set. Choosing between them depends on your garden’s growth phase: use 5‑1‑1 for rapid foliage, then switch to 2‑3‑1 as plants mature.