Comparison: Best Fish Emulsion Kelp Fertilizer (Updated | Dec 1st)
If you’re looking to give your garden a natural boost, you’ve probably heard about fish emulsion and kelp fertilizer—but what happens when you combine the two? We’ve dug into the **best fish emulsion kelp fertilizer**s on the market to find the top performers that deliver lush growth, stronger roots, and vibrant blooms. Let’s dive in and discover which formula truly earns its spot in your gardening routine.
- Best for organic sea blend: GS Plant Foods Liquid Fish & Kelp Fertilizer (1 Gallon) – Organic Material Review Institute Listed Natural Plant Food for Home Gardens
- Best for fast-acting boost: 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-size classic: EB Stone Fish Emulsion with Kelp
- Best for yield boost: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for gallon green power: Organic Fish Emulsion with Kelp
- Best for omri 5-1-1: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for deodorized wintergreen: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for vitamin-rich emulsion: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for compact organic blend: Omri Listed Fish & Kelp Fertilizer for Plants by GS Plant Foods (36oz) – Organic Fertilizer for Vegetables
- Best for small-scale starter: Fish Emulsion Fertilizer
Product Comparison: Best Fish Emulsion Kelp 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.
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
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!
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 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
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
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
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 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
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 in a fish emulsion 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 additional ingredients like kelp, which adds micronutrients and improves soil microbiology. Also consider concentration level and dilution instructions to avoid over‑feeding.
How do the 5‑1‑1 and 2‑3‑1 formulas differ in performance?
A 5‑1‑1 blend, like Alaska Fish Fertilizer, is higher in nitrogen, promoting rapid leafy growth, while a 2‑3‑1 blend, such as the 1‑gallon organic fish emulsion, balances nitrogen with more phosphorus for better flowering and fruiting. Choose 5‑1‑1 for vegetative stages and 2‑3‑1 when you want stronger blooms or fruit set.
Is the strong fish odor a problem for indoor use?
Most liquid fish emulsions have a noticeable scent, but it usually dissipates quickly after application. Products like Down To Earth note the odor but also mention it doesn’t linger indoors, and deodorized options such as Alaska Fish Emulsion with wintergreen can reduce the smell further.
Which size should I buy for a small balcony garden versus a larger backyard?
For a few container plants, a quart‑size bottle (e.g., EB Stone Fish Emulsion) provides enough product without waste. Larger gardens benefit from gallon containers like GS Plant Foods or the Organic Fish Emulsion with Kelp, which lower the cost per ounce and reduce the frequency of repurchasing.
How important is the OMRI listing when choosing a fish emulsion?
OMRI certification guarantees the fertilizer meets organic standards, making it safe for certified organic farms and home gardens. Products such as GS Plant Foods Liquid Fish & Kelp and Alaska Fish Fertilizer carry this listing, giving you confidence that no synthetic chemicals are present.
What are the key benefits of adding kelp to fish emulsion?
Kelp supplies natural plant hormones, trace minerals, and vitamins that enhance root development and stress tolerance. When combined with fish hydrolysate, it improves nutrient uptake and supports a healthy soil microbial community, leading to more vigorous growth.
How do I compare value between concentrated and ready‑to‑use formulas?
Concentrated products, such as the 1‑gallon GS Plant Foods concentrate, require dilution but typically offer a lower price per application and longer shelf life. Ready‑to‑use formulas may cost more per ounce but save time and reduce the chance of mixing errors, which is handy for occasional gardeners.
Can I use the same fish emulsion on both vegetables and ornamental plants?
Yes, most fish‑and‑kelp emulsions are versatile and safe for vegetables, fruits, flowers, lawns, and houseplants when applied at the recommended dilution rates. Just adjust the concentration based on plant type—higher nitrogen for leafy greens and a more balanced mix for blooming ornamentals.