Comparison: Best Fish Emulsion Indoor Plants (Updated | Dec 1st)
We’ve tested top-rated fish emulsions to find the ones that nourish your houseplants effectively while keeping odor and mess to a minimum. Whether you’re a seasoned plant parent or just starting your indoor jungle, this comparison will help you choose the best fish emulsion to keep your greens thriving—naturally and confidently.
- Best for vitamin-rich boost: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for vibrant foliage formula: Fertilome (10612) Fish Emulsion Fertilizer 5-1-1 (32 oz)
- Best for salmon nutrient pack: Fish Emulsion Fertilizer
- Best for sustainable 2-3-1: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for wintergreen deodorized: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for omri certified: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for odorless protein-rich: Neptune’s Harvest Fish Fertilizer 2-4-1
- Best for omega-3 power: Bloom City Organic Wild Fish Fertilizer and Plant Supplement
- Best for large odorless blend: Neptune’s Harvest Fish Fertilizer 2-4-1
- Best for versatile plant mix: Fish Emulsion 16OZ CONC
Product Comparison: Best Fish Emulsion Indoor Plants
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
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!
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
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
Neptune’s Harvest Fish Fertilizer 2-4-1, 18 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
Bloom City Organic Wild Fish Fertilizer and Plant Supplement, Great for Roots and Soil, Made from Sustainable Salmon, 1/2 Pint (8 oz)
- FROM SUSTAINABLE ALASKAN SALMON: Great for Soil and Plants, for indoor and outdoor use.
- CONTAINS SALMON EMULSION AND SALMON OIL: Very high in omega 3 Fatty Acids for Plants. More Amino Acids than any other brand.
- SMELLS LIKE FISH: You know this is the good stuff, because is really really smells like ocean and fish.
- HIGHEST QUALITY, MOST POTENT, BEST VALUE, BIGGEST YIELD: Bloom City’s ingredients are better for plants, better for you, and better for the planet. Simply the best choice for the conscientious grower.
- FORMULATED AND MADE IN THE USA: Designed by botanists and plant chemists in Seattle, Washington. Bloom City chooses only the highest quality ingredient sources and manufacturing methods to create the world’s best craft growing nutrient systems.
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
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
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 for indoor plants?
Look at the NPK ratio, concentration, and whether the formula is fully organic, as these affect nutrient balance and safety. Check the product size and recommended dilution rates to match the scale of your indoor garden. Also review any added benefits such as micronutrients or microbial stimulants that can improve soil health.
How do the NPK ratios affect indoor plant health?
A higher nitrogen (N) level, like the 5‑1‑1 ratios found in many fish emulsions, promotes lush foliage, which is ideal for foliage‑heavy houseplants. Lower phosphorus (P) and potassium (K) ratios support root development and flower formation, useful for blooming indoor species. Choose a ratio that aligns with the growth stage of your plants.
Which products are best for odor‑sensitive indoor environments?
Neptune’s Harvest and Bloom City use cold‑processed fish that retain nutrients while minimizing the typical fishy smell, making them good indoor choices. Alaska Fish Emulsion offers a deodorized version with natural wintergreen scent for a less intrusive aroma. If odor is a major concern, avoid high‑concentration liquid concentrates that are not specially treated.
How does concentration (e.g., 1 gallon vs 8 oz) impact cost and usage?
Larger containers like the 1‑gallon formulas provide a lower cost per ounce but require careful dilution to avoid over‑feeding. Smaller bottles, such as the 8‑oz complete fish emulsion, are convenient for occasional use and reduce waste for small indoor collections. Calculate the total amount of water you’ll treat to decide which size gives the best value.
Are organic certifications like OMRI important for indoor gardening?
OMRI listing confirms that a product meets strict organic standards, which can be reassuring for growers who avoid synthetic chemicals. While not required for plant health, certified products often appeal to environmentally conscious consumers and may be compatible with organic potting mixes. Choose certified options if you prioritize organic gardening principles.
What are the differences between liquid fish emulsion and cold‑processed fish fertilizer?
Liquid fish emulsion is typically a water‑based solution that dilutes easily, offering quick nutrient uptake but sometimes a stronger odor. Cold‑processed fertilizers, like Neptune’s Harvest, retain fish proteins and oils, providing a broader spectrum of micronutrients and a milder scent. Both deliver nitrogen, phosphorus, and potassium, but the processing method influences nutrient stability and user experience.
How can I determine the right application rate for my houseplants?
Start with the manufacturer’s recommended dilution—usually 1‑2 tablespoons per gallon of water for foliage plants and a higher rate for larger trees. Adjust based on plant response: yellowing leaves may indicate over‑fertilization, while slow growth can signal a need for more nutrients. Always water the soil first, then apply the diluted fertilizer to avoid root burn.