Comparison: Best Fish And Kelp Emulsion (Updated | Dec 1st)
If you’re looking to give your garden a natural boost, fish and kelp emulsion is a powerhouse choice—but not all formulas are created equal. We’ve dug into the top contenders, testing for nutrient balance, ease of use, and real results in the soil.
- Best for organic soil boost: GS Plant Foods Liquid Fish & Kelp Fertilizer (1 Gallon) – Organic Material Review Institute Listed Natural Plant Food for Home Gardens
- Best for rapid growth: 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 quart convenience: EB Stone Fish Emulsion with Kelp
- Best for gallon value: Organic Fish Emulsion with Kelp
- Best for burn-free blend: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for yield maximizer: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for omri certified: Omri Listed Fish & Kelp Fertilizer for Plants by GS Plant Foods (36oz) – Organic Fertilizer for Vegetables
- Best for fulvic boost: Fish Emulsion with Kelp & Fulvic Acid
- Best for salmon strength: Fish Emulsion Fertilizer
- Best for odorless powder: Fish Emulsion Fertilizer 12-2-2 Powder (3.3 pounds Powder-Up to 300 Gallons of Water)
Product Comparison: Best Fish And Kelp Emulsion
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
EB Stone Fish Emulsion with Kelp, Quart Size
- All natural plant food to help plants grow, flower, fruit and stay deep green.
- This liquid fertilizer is concentrated and must be diluted before use.
- Derived from: Whole fish and Kelp.
- Quart size
Organic Fish Emulsion with Kelp, one Gallon Size
- All natural plant food to help plants grow, flower, fruit and stay deep green.
- This liquid fertilizer is concentrated and must be diluted before use.
- Derived from: Whole fish and Kelp.
- One Gallon Size
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!
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.
Fish Emulsion with Kelp & Fulvic Acid
- Biologically Active Formula: Omega Genetix Fish Emulsion is an organic liquid fertilizer derived from hydrolyzed fish, kelp (Ascophyllum nodosum), and fulvic acid, delivering a complete range of macro (N, P, K) and micronutrients to support key physiological processes including vegetative growth and reproductive development.
- Enhanced Nutrient Profile: Supplies essential secondary nutrients (Mg, S, Ca, Fe) critical for chlorophyll synthesis, enzymatic function, and root system architecture, aiding in photosynthetic efficiency and cellular metabolism across growth stages.
- Soil Microbial Synergy: The fish hydrolysate component promotes rhizosphere microbial activity, accelerating organic matter decomposition and enhancing the bioavailability of nutrients, contributing to improved soil structure and nutrient cycling.
- Fulvic Acid Efficacy: Contains low molecular weight fulvic acid to facilitate chelation and transmembrane transport of nutrients, leading to improved root development, nutrient uptake efficiency, and enhanced plant biomass and vigor.
- Application & Safety: Fully compatible with conventional NPK programs and certified 100% organic for agricultural use; non-toxic to crops but should not be ingested or exposed to animals due to potential biological activity.
Fish Emulsion Fertilizer, Complete Fish Emulsion Plant Food, 8 oz (250mL)
- Complete fish fertilizer for thriving plants
- Helps growth with natural harvest salmon nutrients
- Easy-to-follow care instructions included
- Made in the USA
Fish Emulsion Fertilizer 12-2-2 Powder (3.3 pounds Powder-Up to 300 Gallons of Water), for Vegetables, Trees, Lawns, Shrubs, Flowers, Fruits
- Organic Fish Protein :12-2-2 NPK powder made from 100% fish dried liquid powder, ground, and highly water-soluble when mixed.
- 2× Super Concentrated Powder: 1 lb (≈450 g) makes up to 100 gal of liquid feed,ideal for both large veggie plots and indoor/hydro gardens, creating high-value yield.
- Proven Results and Trusted Organic Fertilizer: Comparison experient conducted on same seed, same soil. The fertilizer supports visible growth and robust fruit set.
- Promotes Healthier Roots & Foliage: Rich in natural amino acids and micronutrients, boosts plant stress resistance, soil biology, and nutrient uptake.
- Reduced Odor, Easy to Use: Dry powder form alleviates the strong “fishy” smell of traditional emulsions. Simple to store, measure, and apply; mix and water every 1–2 weeks.
- Sustainable & Responsibly Sourced: Made in small batches from by products of the fish meal industry, organically biodegradable with minimal waste.
- Includes a teaspoon for ease of measurement
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 liquid fish and kelp fertilizer?
Check the NPK ratio to match your plant’s growth stage, and verify if the product is OMRI‑listed for organic gardening. Look for added ingredients like fulvic acid or micronutrients that can boost nutrient uptake. Also consider the concentration level and recommended dilution rates to avoid over‑feeding.
How do the GS Plant Foods and Down To Earth formulas differ?
GS Plant Foods offers a 2 oz per gallon mix with a focus on soil microbiology, while Down To Earth uses a ¼–½ cup per gallon ratio and emphasizes high phosphorus for flowering. Both are fish‑kelp blends, but Down To Earth notes a stronger fish odor that may be noticeable indoors. Pricing and packaging sizes also vary, giving you flexibility based on garden size.
Is the odor of fish emulsion a deal‑breaker?
Fish emulsion naturally has a fishy smell, but many products mitigate it with deodorizing agents like natural wintergreen (Alaska Fish Emulsion) or by using a powder form (Fish Emulsion 12‑2‑2 Powder). The odor usually dissipates quickly after application, especially when diluted and applied outdoors. If indoor use is a priority, choose a low‑odor or powder variant.
Which product gives the best value for large garden areas?
For expansive gardens, the 1‑gallon GS Plant Foods or the 12‑2‑2 Powder (which stretches up to 300 gallons) provide the most coverage per dollar. The powder form also reduces shipping weight and storage space. Compare the cost per usable gallon after dilution to determine the most economical option.
Are there any advantages to choosing a fertilizer with added fulvic acid?
Fulvic acid chelates nutrients, improving root absorption and overall plant vigor, as seen in the Omega Genetix Fish Emulsion with Kelp & Fulvic Acid. This can be especially beneficial for soils with poor nutrient availability or for container gardening where rapid uptake is needed. The added cost is often justified by the enhanced growth response.
Can I use the same fish emulsion for vegetables, flowers, and lawns?
Yes, most fish‑kelp emulsions are versatile and safe for a wide range of plants, but dilution rates differ: lawns typically need 2–4 oz per gallon, while vegetables and flowers use 1–2 tbsp per gallon. Follow the label instructions for each plant type to avoid over‑fertilizing. Organic certification ensures the formula won’t harm edible crops.
How important is the NPK ratio for fish emulsion products?
The NPK ratio indicates the balance of nitrogen, phosphorus, and potassium; a 2‑3‑1 ratio (like in the 1‑gallon Organic Fish Emulsion) supports balanced vegetative growth and fruiting. Higher phosphorus blends, such as Down To Earth, are better for blooming plants, while lower ratios suit leafy greens. Choose a ratio that aligns with your garden’s current growth phase.
Is it worth paying more for a certified organic fish emulsion?
Certified organic products, such as those OMRI‑listed by GS Plant Foods, guarantee no synthetic additives and often include stricter quality controls. This can translate to healthier soil biology and safer produce for consumption. If organic certification is important to you, the slight price premium is generally justified.