Comparison: Best Liquid Fish Fertiliser (Updated | Dec 1st)
But with so many options on the shelf, how do you know which one’s truly the best? We’ve tested top contenders for effectiveness, smell, ease of use, and value to help you make the smartest choice—because your plants deserve the good stuff, and so do you.
- Best for cold-pressed power: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for macro-micro boost: GS Plant Foods Organic Liquid Fish Fertilizer – Natures Growth Boost
- Best for certified organic: GS Plant Foods Liquid Fish Fertilizer – Organic Material Review Institute Listed (1 Gallon) – Natural Hydrolyzed Fish Fertilizer for Gardens
- Best for vitamin-rich formula: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- 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 fast-acting blend: Down To Earth All Natural Fertilizers Organic Liquid Fish & Kelp Concentrate – Plant Food for Vegetable Gardens and Flower Beds – Makes up to 32 Gallons 2-4-1
- Best for premium hydrolysate: Indian River Organics OMRI Listed Organic
- Best for high-nitrogen boost: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for compact sea blend: Omri Listed Fish & Kelp Fertilizer for Plants by GS Plant Foods (36oz) – Organic Fertilizer for Vegetables
- Best for deodorized formula: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
Product Comparison: Best Liquid Fish Fertiliser
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!
GS Plant Foods Organic Liquid Fish Fertilizer – Natures Growth Boost, OMRI-Certified, Hydrolyzed, Fish-Based, Organic Gardening Solution, 1 Quart
- OMRI ORGANIC LISTED HYDROLYZED FISH FERTILIZER: GS Plant Foods Organic Liquid Fish is an all-natural high quality fresh fish liquid fertilizer that gives excellent plant growth, rebuilds soil, and offers higher production yields. Our fish fertilizer will help stimulate growth and improve plant health and color. Tremendously beneficial for soil quality and improved rooting, this organic fish fertilizer can be applied to any type of soil or plant without concern for waste or harmful chemicals.
- PACKED WITH MACRO & MICRO NUTRIENTS: Our proprietary and all-natural fish fertilizer provides much more than N-P-K (Nitrogen, Phosphorus and Potassium) found in synthetic fertilizers. This fish plant fertilizer provides a comprehensive mix of macro & micro nutrients, minerals, peptides, proteins, and calcium, all in a usable form perfectly suited for maximum efficiency of uptake for your plants. The fish plant food fertilizer stimulates water penetration and increases nutrient assimilation.
- OPTIMAL PLANT GROWTH & HEALTH AT HOME OR COMMERCIALLY: Used in low concentrations, liquid fish fertilizer organic acts as an efficacious growth promoter. GS Plant Foods organic hydrolyzed fertilizer promotes growth of healthy bacteria. It is used extensively on a commercial basis, as well as at home as an organic soil conditioner. The end result is a powerfully effective, organic fertilizer and soil supplement that contains no chlorine or heavy metals. It is great for everything that grows!
- WORKS SYNERGISTICALLY WITH ALL FERTILIZERS:This liquid fish fertilizer is among the highest quality plant food products that you can get. It works synergistically with all fertilizers especially with a high quality liquid kelp fertilizer such as GS Plant Foods Organic Liquid Kelp. Use fish fertilizer on lawns, vegetables, fruits, trees & shrubs, seedlings and transplants as a regular healthful maintenance program to experience healthier plants with stronger, and more developed root systems.
- EASY TO APPLY FOR NATURAL GREAT RESULTS: Apply hydrolyzed fish fertilizer to improve specific growth stages. Apply generously to soil or as a foliar feed until leaves are wet, top and bottom. For lawns, one gallon of fertilizer mixed with 30-40 gallons of water will cover ¼ acre. Feed lawn every 4 weeks. Trees and shrubs use 4 oz per gallon of water. Feed by boring small holes 1 to 2 feet away from the root ball. Fill holes with solution. For best results, foliar feed early or late in the day.
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).
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
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.
Down To Earth All Natural Fertilizers Organic Liquid Fish & Kelp Concentrate – Plant Food for Vegetable Gardens and Flower Beds – Makes up to 32 Gallons 2-4-1, 32 oz
- Fast‑acting liquid formula: Perfect for foliar feed or soil drench applications, supporting quick absorption and growth stimulation.
- Stimulates overall plant vigor: High phosphorus aids flowering and fruiting, while nitrogen supports lush foliage and root development.
- Organic & soil‑friendly: Helps promote beneficial microbial activity and sustainable soil health due to its fish and kelp base
- Versatile application rates: For general garden use: ¼–½ cup per gallon of water; for containers: 2–4 Tbsp per gallon; for houseplants: 2 Tbsp per gallon, repeated every 2–4 weeks depending on growth stage
- Watch out for odor: While extremely effective, many users report a strong fish-like odor characteristic of fish emulsions—though it typically subsides quickly and doesn’t linger long indoors
Indian River Organics OMRI Listed Organic, Hydrolyzed Liquid Fish Fertilizer, 1 Quart / 36 ounces net wt.
- Far Superior to Emulsions: Our Proprietary Cold-Process Hydrolysis Preserves the Complex Nutrients that create Bigger Flower Blooms, Tastier Fruits & Vegetables, and Vibrant Green Lawns.
- 100% OMRI-LISTED Organic: Has the Organic Materials Review Institute (OMRI) seal (our competitors don’t)! Approved & suitable for use in certified organic operations under the USDA National Organic Program.
- Free of Contaminants: Our High-Quality Hydrolysate Fertilizer is Sustainably Produced from fresh, healthy, food-quality fish, free of chlorine, mercury, and other heavy metals. Family & pet friendly.
- EASY TO USE and Won’t Clog Equipment: Water Soluble; Just Mix with Water and Apply! We win new customers because our product works flawlessly with application equipment. Safely access your lawn after application. No waiting period.
- 100% Quality Guarantee: We’re incredibly proud of our product’s consistency, and we guarantee our nutrient analysis in every bottle. If you have concerns, let us know and we’ll be happy to work with you.
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
Omri Listed Fish & Kelp Fertilizer for Plants by GS Plant Foods (36oz) – Organic Fertilizer for Vegetables, Trees, Lawns, Shrubs, Flowers, Seeds & Plants – Hydrolyzed Fish and Seaweed Blend
- OMRI ORGANIC LISTED FISH AND SEAWEED BLEND: GS Plant Foods all-natural liquid fish is a high quality organic product that gives excellent plant growth, rebuilds soil, and offers higher production yields. Kelp is often applied to any type of plants, trees, lawns, flowers, vegetables and seeds without concern for harmful runoff.
- OPTIMAL PLANT GROWTH & HEALTH AT HOME OR COMMERCIALLY: Used in low concentrations, liquid seaweed fertilizer acts as an efficacious growth promoter. GS Plant Foods fish seaweed fertilizer is used extensively on a commercial basis, as well as at home for gardeners as an organic soil conditioner. This fish fertilizer for vegetables will lead to healthier crop yields and general plant well being.
- EASY TO APPLY FOR NATURAL GREAT RESULTS: Apply liquid fish & kelp fertilizer to improve specific growth stages. For House Plants; use 1 tablespoon per gallon of water. Feed every two weeks and do not over water. For Outdoor Plants; Use 2 fl. Oz per gallon of water. Feed vegetables, flowers, trees and shrubs every 2-3 weeks. Apply until soil is saturated or as a foliar feed until leaves are wet, top and bottom. For Lawns; use 2 to 4 oz concentrate per gallon of water to cover 1,000 sq. ft.
- TRUSTED & RELIABLE: At GS Plant Foods, we understand that you are placing your trust in us to provide you with the highest quality products available. We have 100% confidence in the quality of our products and continuously strive to deliver the best customer experience. Our products are organic, easy to use, cost efficient, sustainable, and yield consistent & amazing results in your garden, no matter what you’re growing or what medium in which your plants are growing.
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
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 key features should I compare when choosing a liquid fish fertilizer?
Look for the NPK ratio, OMRI certification, and whether the formula includes additional micronutrients or kelp. A higher nitrogen content promotes foliage, while a balanced 2-3-1 ratio supports overall growth. Also consider odor strength, container size, and price per gallon to gauge overall value.
How does the NPK ratio influence plant performance, and which ratio is most versatile?
A 2-3-1 ratio, found in several products like the 1‑gallon Organic Fish Emulsion and GS Plant Foods Liquid Fish, provides a balanced supply of nitrogen, phosphorus, and potassium for both vegetative and flowering stages. Higher nitrogen (e.g., 5-1-1) boosts leafy growth but may delay blooming. For most home gardens, the 2-3-1 blend offers the greatest flexibility across plant types.
Which liquid fish fertilizer gives the best value for a large garden or lawn?
GS Plant Foods Organic Liquid Fish (1 gallon) and the GS Fish & Kelp blend both cover roughly a quarter‑acre when mixed at the recommended 1 gallon + 30‑40 gallons of water, making them cost‑effective for extensive areas. Their OMRI listing adds confidence for organic growers, and the inclusion of kelp in the blend can further improve soil health, enhancing overall value.
Do all fish fertilizers smell strongly, and does odor indicate quality?
Real fish emulsions naturally have a pungent fishy scent, as highlighted by the 1‑gallon Organic Fish Emulsion product. While a strong odor confirms the presence of authentic fish material, some brands deodorize their concentrate (e.g., Alaska Fish Emulsion with wintergreen) to reduce the smell without sacrificing nutrients. Choose based on your tolerance for odor and indoor‑use considerations.
Is OMRI certification important for my organic gardening goals?
Yes, OMRI‑listed products like GS Plant Foods Liquid Fish, Indian River Organics, and Alaska Fish Fertilizer meet the USDA National Organic Program standards, allowing you to maintain certified organic status. These fertilizers are free from prohibited synthetic chemicals and heavy metals, ensuring compliance and soil health. If certification is not required, non‑OMRI options may still perform well but lack the official organic guarantee.
How do fish‑kelp blends compare to pure fish emulsion fertilizers?
Fish‑kelp blends, such as GS Plant Foods Fish & Kelp or Down To Earth, combine the nitrogen‑rich fish hydrolysate with seaweed’s micronutrients and hormones, promoting stronger root systems and improved nutrient uptake. Pure fish emulsion provides a straightforward source of NPK and amino acids, which is excellent for rapid foliage growth. For balanced, long‑term soil health, many gardeners prefer the added benefits of kelp.
What are the typical application rates, and are they easy to mix?
Most products recommend mixing 2‑4 oz of concentrate per gallon of water for soil drenching or foliar feeding, which can be measured with a standard kitchen spoon. For lawns, a gallon of fertilizer diluted in 30‑40 gallons of water covers about ¼ acre, simplifying large‑area applications. The instructions are consistent across brands, making preparation straightforward even for beginners.
Which liquid fish fertilizer is best suited for indoor houseplants?
Central Garden Brands 1‑quart Fish Emulsion and Down To Earth’s low‑odor concentrate are ideal for indoor use because of their smaller packaging and milder scent. Both recommend a gentle dilution of 1‑2 Tbsp per gallon of water, ensuring plants receive nutrients without overwhelming indoor air. Their balanced 2‑3‑1 NPK ratio supports foliage growth without causing leaf burn.