Comparison: Best Homemade Fish Emulsion Fertilizer (Updated | Dec 1st)
If you’ve ever wondered how some gardeners get their tomatoes so plump or their greens so vibrant—without reaching for synthetic chemicals—you might want to dive into the world of homemade fish emulsion fertilizer. In this article, we’ll compare the best DIY fish emulsion recipes, weighing ease, effectiveness, and that lingering backyard aroma, so you can choose the right one for your garden—and your nose.
1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
Sustainable Yield Booster
- Best for vitamin-rich boost: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for omri certified: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for wintergreen deodorized: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for deep green growth: Fertilome (10612) Fish Emulsion Fertilizer 5-1-1 (32 oz)
- Best for salmon nutrient blend: Fish Emulsion Fertilizer
- Best for sustainable yield booster: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for low-odor powder: Fish Emulsion Fertilizer 12-2-2 Powder (3.3 pounds Powder-Up to 300 Gallons of Water)
- Best for broad plant compatibility: Fish Emulsion 16OZ CONC
- Best for cold-processed odorless: Neptune’s Harvest Fish Fertilizer 2-4-1
- Best for chelated nutrient power: Neptune’s Harvest Fish Fertilizer 2-4-1
Product Comparison: Best Homemade Fish Emulsion 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
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
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
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!
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
Neptune’s Harvest Fish Fertilizer 2-4-1, 36 Ounce
- Neptune’s Harvest is an organic fertilizer made from fresh north Atlantic fish
- It is made by a unique cold process that protects the vitamins, amino acids, enzymes and growth hormones
- It also contains all the micro and macro nutrients naturally found in fish
- Unlike fish emulsions, Neptune’s Harvest retains the fish proteins and oils and has no unpleasant odor
Neptune’s Harvest Fish Fertilizer 2-4-1, Gallon
- An organic fertilizer made from fresh North Atlantic fish
- Made by a unique cold process that protects the vitamins, amino acids, enzymes and growth hormones
- Contains all the micro and macro nutrients naturally found in fish
- The nitrogen and other nutrients are chelated, so they are readily available for plants consumption
- The fish proteins and oils are retained and the fertilizer has no unpleasant odor
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 nutrients should I check on a fish emulsion label?
Look for the N-P-K ratio, which indicates the percentages of nitrogen, phosphate, and potassium; common ratios are 5-1-1 or 2-4-1. Higher nitrogen supports leafy growth, while balanced phosphorus and potassium aid root and flower development. Also verify that the product lists additional micronutrients and amino acids, which improve overall plant health.
How does liquid fish emulsion compare to powdered forms?
Liquid emulsion, like the 1‑gallon options, is ready to dilute and apply, offering quick nutrient uptake but often has a strong fishy odor. Powdered versions, such as the 12‑2‑2 powder, are more concentrated, have reduced odor, and are easier to store for long periods. Choose liquid for fast results on small gardens and powder for large plots or indoor setups where odor is a concern.
Is an OMRI‑listed fish fertilizer necessary for organic gardening?
OMRI listing confirms that a product complies with organic certification standards, making it safe for certified organic farms. While non‑OMRI fish emulsions still provide natural nutrients, they may not be eligible for use in officially organic production. If you need to maintain organic certification, prioritize OMRI‑listed options.
What should I consider when deciding on container size?
Smaller containers (8‑16 oz) are convenient for indoor plants and trial use, but you’ll need to purchase more frequently. Larger gallons or bulk containers (1 gal or more) lower the per‑ounce cost and are ideal for extensive garden beds or regular feeding schedules. Factor in storage space and how quickly you’ll use the product to avoid waste.
Do fish emulsions burn plant roots?
High‑quality fish emulsions are formulated to be gentle and “won’t burn” even when applied at recommended concentrations. Over‑diluting or applying too much can still cause leaf tip burn, especially on sensitive seedlings. Always follow the label’s mixing instructions and start with a weaker solution for new plants.
Which fish emulsion offers the best value for money?
Value is a mix of price per ounce, nutrient concentration, and additional benefits like odor reduction. Products like the 1‑gallon organic fish emulsion with a 2‑3‑1 NPK ratio provide a good balance of low cost and high nutrient density. Compare the total cost per usable gallon after dilution to determine the most economical choice.
How important is odor when choosing a fish fertilizer?
Traditional liquid emulsions can emit a strong fishy smell, which may be undesirable for indoor or balcony gardening. Deodorized formulas or powdered versions significantly reduce odor while delivering the same nutrients. If you plan to use the fertilizer near living spaces, opt for low‑odor or powder products.
Can I use fish emulsion on both indoor and outdoor plants?
Yes, most fish emulsions are versatile and safe for a wide range of plant types, from houseplants to vegetable gardens. Ensure you dilute the product appropriately for indoor use to avoid excess moisture and potential fungal issues. Outdoor applications can be more concentrated, especially for established trees and shrubs.