Comparison: Best Diluted Fish Emulsion Fertilizer (Updated | Dec 1st)
If you’re looking to give your garden a natural boost, you’ve probably heard about fish emulsion fertilizer. But not all bottles are created equal—especially when it comes to diluted formulas that save you time and money. We’ve tested top contenders to find which ones deliver lush growth without the stink or fuss. From organic blends to budget-friendly picks, we’ll break down what really works in your soil.
- Best for vitamin boost: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for omri certified: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for wintergreen fresh: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for salmon nutrients: Fish Emulsion Fertilizer
- Best for yield-boosting formula: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for powdered power: Fish Emulsion Fertilizer 12-2-2 Powder (3.3 pounds Powder-Up to 300 Gallons of Water)
- Best for foliage enhancer: Fertilome (10611) Fish Emulsion Fertilizer 5-1-1 (16 oz)
- Best for large-scale boost: Fertilome (10612) Fish Emulsion Fertilizer 5-1-1 (32 oz)
- Best for odorless protein: Neptune’s Harvest Fish Fertilizer 2-4-1
- 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
Product Comparison: Best Diluted 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
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
Fertilome (10611) Fish Emulsion Fertilizer 5-1-1 (16 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.
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.
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
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.
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 consider when choosing a fish emulsion fertilizer?
Look at the NPK ratio, concentration level, and whether the product is OMRI‑listed for organic gardening. Check if the formula is liquid, powder, or concentrate, as this affects dilution rates and storage. Also consider odor level and any added ingredients like kelp or micronutrients that can boost plant health.
How do liquid fish emulsions compare to powder forms?
Liquid emulsions, such as the Central Garden Brands 1‑quart or the 1‑gallon organic fish emulsion, are ready‑to‑mix and work quickly for foliar sprays and soil drenches. Powder versions, like the 12‑2‑2 fish protein powder, offer a lower odor and can be diluted to make large volumes of feed, which is cost‑effective for big garden beds. The trade‑off is that powders require more mixing effort and precise measurement.
Is a higher NPK ratio always better for my garden?
Not necessarily; a higher nitrogen (N) content promotes leafy growth, while lower phosphorus (P) and potassium (K) ratios are better for fruiting and root development. For general houseplants, a balanced 5‑1‑1 blend works well, whereas a 12‑2‑2 powder is suited for heavy‑feeding vegetable plots. Match the ratio to the growth stage and type of plants you are cultivating.
What are the benefits of OMRI‑listed fish fertilizers?
OMRI‑listed products, like Alaska Fish Fertilizer 5‑1‑1, meet strict organic standards, ensuring they contain no synthetic chemicals. This certification is important for certified organic growers and for gardeners who want to maintain soil health and biodiversity. The label also signals consistent quality and reliable nutrient content.
How does odor affect the choice of fish emulsion?
Traditional liquid emulsions can have a strong fishy smell, which some gardeners find off‑putting; products like the Alaska Fish Emulsion with natural wintergreen deodorization reduce this issue. Powdered fish protein eliminates most odor because it’s dry, while concentrated liquids may still retain a noticeable scent. Choose based on your tolerance for smell and where you’ll be applying the fertilizer.
Which product offers the best value for large‑scale applications?
The 1‑gallon organic fish emulsion fertilizer provides a high volume of feed at a lower per‑gallon cost, making it economical for extensive garden beds. The 12‑2‑2 powder is even more cost‑effective, as one pound can make up to 100 gallons of liquid feed, ideal for large vegetable plots or hydroponic systems. Compare the price per usable gallon to determine the most budget‑friendly option.
Can I use fish emulsion on both indoor and outdoor plants?
Yes, most fish emulsions, including Central Garden Brands and Fertilome, are formulated for indoor houseplants as well as outdoor gardens, lawns, and trees. Just follow the recommended dilution rates to avoid over‑feeding, especially for sensitive indoor foliage. Using the same product for both environments simplifies inventory and ensures consistent nutrient delivery.
What additional nutrients or additives should I look for?
Some formulas blend fish emulsion with kelp, seaweed, or micronutrients, like the GS Plant Foods Liquid Fish & Kelp Fertilizer, which supports soil microbiology and improves nutrient uptake. Others, such as Neptune’s Harvest, retain fish oils and proteins for a broader spectrum of macro‑ and micronutrients with minimal odor. Choose a product that matches any specific soil deficiencies or growth goals you have.