Comparison: Best Fish Seaweed Emulsion (Updated | Dec 1st)
If you’re on the hunt for the **best fish seaweed emulsion** to give your garden that lush, thriving edge, you’re not alone. Gardeners everywhere swear by this dynamic duo of nutrients, but with so many options out there, how do you know which one delivers? We’ve dug into the top contenders—testing smell, consistency, ingredient quality, and real results—so you don’t have to guess. Whether you’re growing tomatoes, flowers, or leafy greens, the right emulsion can make all the difference.
- Best for compact garden boost: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1
- Best for wintergreen fresh blend: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for balanced bloom booster: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1 (36 Ounce)
- Best for cold-pressed organic: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for vibrant foliage formula: Fertilome (10612) Fish Emulsion Fertilizer 5-1-1 (32 oz)
- Best for usa made complete: Fish Emulsion Fertilizer
- Best for gallon garden power: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1 (Gallon)
- Best for odorless powder power: Fish Emulsion Fertilizer 12-2-2 Powder (3.3 pounds Powder-Up to 300 Gallons of Water)
- Best for standard npk concentrate: Fish Emulsion 16OZ CONC
- Best for organic fish-kelp: Omri Listed Fish & Kelp Fertilizer for Plants by GS Plant Foods (36oz) – Organic Fertilizer for Vegetables
Product Comparison: Best Fish Seaweed Emulsion
Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1, 18 Ounce
- Grow a beautiful vegetable garden
- Flowers and foliage will be stronger and more colorful
- Blooms will be more plentiful, fragrant and longer lasting
- Easy to mix and apply by hand, sprayer, or drip line
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
Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1 (36 Ounce)
- Grow a beautiful vegetable garden
- Flowers and foliage will be stronger and more colorful
- Blooms will be more plentiful, fragrant and longer lasting
- Easy to mix and apply by hand, sprayer, or drip line
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!
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.
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
Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1 (Gallon)
- Grow a beautiful vegetable garden
- Flowers and foliage will be stronger and more colorful
- Blooms will be more plentiful, fragrant and longer lasting
- Easy to mix and apply by hand, sprayer, or drip line
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
Fish Emulsion 16OZ CONC
- Total Nitrogen – 5% Available Phosphate – 1% Soluble Potash – 1%
- For use in Potted and house plants, fruits, vegetables, ornamentals and shade trees: african violets, ferns, tuberous begonias, camellias, azaleas, rhododendrons, acid-tolerant plants, fuchsias, chrysanthemums, orchids, vegetables, shrubs, berries, trees (fruit, shade, deciduous), roses, flowers (annual and perennial), and transplants * See label for complete list
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.
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 choose for my garden?
A 2‑3‑1 ratio, like Neptune’s Harvest and the 1‑gallon organic fish emulsion, is ideal for balanced growth of vegetables, flowers, and foliage with frequent light feedings. Higher nitrogen formulas such as 5‑1‑1 (Alaska Fish Emulsion, Fertilome) boost leafy growth but can cause excess vigor if over‑applied. Consider the plant type: leafy greens benefit from more nitrogen, while fruiting plants prefer a slightly lower nitrogen level.
How does a liquid fish emulsion compare to a powdered version?
Liquid emulsions (e.g., Alaska Fish Emulsion, Neptune’s Harvest) are ready to dilute and apply, offering quick nutrient uptake and easy foliar feeding. Powdered options like the 12‑2‑2 Fish Emulsion Powder provide a higher nutrient concentration per pound and have reduced odor, making storage and handling simpler. Choose liquid for convenience and rapid results, or powder for cost‑efficiency on large plots and lower smell.
Is the odor a concern when using fish emulsion?
Traditional liquid emulsions have a noticeable fishy smell, which is a sign of genuine fish content; the 1‑gallon organic fish emulsion emphasizes this authenticity. Powdered formulas and deodorized products like Alaska Fish Emulsion claim reduced odor, making them better for indoor or patio use. If you garden near living spaces, a low‑odor or powder product may be more comfortable.
Do any of these fertilizers contain seaweed or kelp, and why does that matter?
Neptune’s Harvest and the GS Plant Foods fish & kelp blend both include seaweed, which adds natural hormones that improve root development and stress tolerance. Seaweed also supplies micronutrients and improves soil biology, leading to stronger, more resilient plants. For gardeners seeking an extra growth boost, a seaweed‑enhanced formula can be a valuable addition.
Which product offers the best value for larger gardens?
The 1‑gallon organic fish emulsion and the 12‑2‑2 powder provide the most nutrient per dollar when covering extensive areas, as they can be diluted to treat many gallons of water. The 5‑1‑1 gallon from Alaska also offers a good price per ounce but may require more frequent applications. Compare the price per ounce and the dilution rate to determine the most economical choice for your plot size.
Can I use these fertilizers on indoor houseplants?
Yes, most liquid emulsions and the 5‑1‑1 Fertilome formula are safe for indoor plants when diluted to the recommended strength (typically 1‑2 Tbsp per gallon of water). The low‑odor options, such as the deodorized Alaska Fish Emulsion, are especially suitable for indoor environments. Always start with a weaker solution and observe plant response before increasing concentration.
What application methods are compatible with these products?
All listed products can be mixed with water for use in hand watering, sprayers, or drip irrigation systems. Powdered fish emulsion requires thorough mixing to avoid clumping, while liquid emulsions can be added directly to a watering can or hose-end sprayer. Follow each label’s recommended dilution rates to ensure even distribution and prevent root burn.
Are any of these fertilizers certified organic?
The GS Plant Foods fish & kelp blend is OMRI‑listed, confirming it meets organic standards for commercial use. Neptune’s Harvest and the 1‑gallon organic fish emulsion also market themselves as organic, though they may not carry a specific certification label. If strict organic certification is essential for your garden, verify the product’s OMRI or USDA organic status before purchasing.