Comparison: Best Liquid Fish Fertilizer (Updated | Dec 1st)
If your garden’s looking a little under the weather, it might just be craving some liquid love. But with so many options on the shelf, how do you know which one’s truly the best? We’ve done the digging (and the smelling) to bring you a clear, honest comparison of the top contenders. Whether you’re growing tomatoes, flowers, or lush greens, we’ll help you pick the right bottle to feed your soil—and your garden—right.
- Best for vitamin-rich boost: 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 omri certified blend: 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 hydrolyzed nutrient boost: Organic Hydrolyzed Liquid Fish Fertilizer by GS Plant Foods (1 Gallon)
- Best for growth-boost formula: GS Plant Foods Organic Liquid Fish Fertilizer – Natures Growth Boost
- Best for compact fish-kelp: Omri Listed Fish & Kelp Fertilizer for Plants by GS Plant Foods (36oz) – Organic Fertilizer for Vegetables
- Best for fast-acting formula: 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 deodorized burn-free: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for microbe-boost formula: Just Scentsational Bare Ground Solutions TP-128G Trident’s Pride Organic Liquid Fish Hydroponic Soil Fertilizer
Product Comparison: Best Liquid Fish Fertilizer
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!
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.
Organic Hydrolyzed Liquid Fish Fertilizer by GS Plant Foods (1 Gallon)
- 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 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.
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.
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
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
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.
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 factors should I look at when picking a liquid fish fertilizer?
Check the NPK ratio, organic certifications (like OMRI), and any added ingredients such as kelp or micronutrients. Look for clear usage instructions, dilution rates, and whether the product is deodorized if odor is a concern. Also compare container size and price to gauge overall value.
How do the NPK ratios differ among the listed fertilizers?
The 1‑gallon organic fish emulsion (B09FZTPQJL) advertises a 2‑3‑1 ratio, ideal for frequent, light feeding. Alaska Fish Fertilizer (B0DQ2LNX35) and its concentrate (B002RH0B26) both use a 5‑1‑1 ratio, providing a higher nitrogen boost for leafy growth. Products that blend fish with kelp, like GS Plant Foods (B00BBLMXVQ), focus less on a specific NPK label and more on a balanced micronutrient profile.
Which product gives the best value per ounce?
The 1‑gallon Alaska Fish Fertilizer (B002RH0B26) offers a low‑cost, high‑volume option with a 5‑1‑1 ratio and deodorized formula, making it economical for large gardens. The 1‑gallon GS Plant Foods Fish & Kelp blend (B00BBLMXVQ) is slightly pricier but adds kelp nutrients, which can justify the cost for diverse plant types. For smaller budgets, the 36‑oz fish & kelp mix (B00A2A2GT6) provides a mid‑range price with a convenient size.
Is odor a problem with these fertilizers, and how do the products compare?
Most fish emulsions have a noticeable fishy smell, especially the concentrated 1‑gallon product (B09FZTPQJL) which advertises a strong aroma as a sign of authenticity. Alaska’s deodorized version (B002RH0B26) uses natural wintergreen to mask the scent, making it better for indoor use. The kelp‑enhanced blends (B00BBLMXVQ and B00LUT5E74) tend to have a milder odor due to the seaweed component.
Why is OMRI certification important when buying fish fertilizer?
OMRI certification guarantees that the product meets organic farming standards and can be used in certified organic gardens. Several items, such as Alaska Fish Fertilizer (B0DQ2LNX35) and GS Plant Foods’ range (B00BBLMXVQ, B00LUT5E74, B009CZH7UU), carry this label, assuring growers of compliance and safety. Choosing OMRI‑listed fertilizers can also simplify record‑keeping for organic certification.
Which fertilizer is best suited for indoor plants versus outdoor gardens?
For indoor plants, the smaller 36‑oz fish & kelp blend (B00A2A2GT6) or the deodorized Alaska concentrate (B002RH0B26) are ideal because they have milder odors and easy‑to‑measure dosing. Outdoor gardeners looking for high‑volume feeding may prefer the 1‑gallon Alaska Fish Fertilizer (B0DQ2LNX35) or the GS Plant Foods 1‑gallon fish fertilizer (B00LUT5E74) for broader coverage and stronger nutrient delivery.
How do fish‑only emulsions compare to fish‑and‑kelp blends?
Fish‑only products, like the Central Garden Brands Emul Fertilizer (B000BX4QGK), focus on providing high nitrogen and essential vitamins for rapid foliage growth. Blends that add kelp, such as GS Plant Foods Fish & Kelp (B00BBLMXVQ), supply additional trace minerals, hormones, and micronutrients that support root development and stress tolerance. The choice depends on whether you prioritize quick leaf growth or a more balanced, long‑term soil health approach.
What are the recommended application rates for these liquid fertilizers?
Most manufacturers suggest mixing 1–2 tablespoons of concentrate per gallon of water for houseplants and 2–4 ounces per gallon for larger outdoor plants, applying every 2–4 weeks. The 1‑gallon Alaska concentrate (B002RH0B26) recommends ¼–½ cup per gallon for general garden use, while the GS Plant Foods fish fertilizer advises 2 oz per gallon for lawns and 4 oz per gallon for trees and shrubs. Always follow label directions and adjust based on plant stage and soil conditions.