Comparison: Best Fermented Fish Fertilizer (Updated | Dec 1st)
If your garden’s craving a natural boost, fermented fish fertilizer might just be the secret weapon you’ve been missing. But with so many options out there, how do you know which one delivers real results without the stink? We’ve dug into the top contenders—balancing nutrient content, ease of use, and garden performance—to help you choose the **best fermented fish fertilizer** without the guesswork. Whether you’re growing tomatoes, roses, or leafy greens, the right feed can make all the difference.
- Best for omri certified: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for vitamin‑rich boost: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for wintergreen deodorized: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for sustainably sourced: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- 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
- Best for hi‑energy salmon: Elm Dirt Fish Emulsion Fertilizer – High Energy Liquid Fertilizer for Plants 2-3-0 | Increase Biological Activity & Improve Nutrients
- Best for low‑odor seaweed: Liquid Seaweed Fertilizer for Plants with Soil Activator
- Best for fermented seaweed: Liquid Seaweed Fertilizer for Plants with Soil Activator
- Best for compact emulsion: Fish Emulsion Fertilizer
- Best for seaweed‑boost blend: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1 (36 Ounce)
Product Comparison: Best Fermented 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
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 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
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!
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.
Elm Dirt Fish Emulsion Fertilizer – High Energy Liquid Fertilizer for Plants 2-3-0 | Increase Biological Activity & Improve Nutrients, Vegetable Garden (32 oz)
- Introducing Elm Dirt Hi-Energy Fish: At the heart of our innovative Hi-Energy Fish product lies the essence of naturally fermented whole salmon, a distinctive offering unlike any other in the fish product spectrum. What sets it apart? The salmon’s vibrant pink flesh and rich fat content paved the way for a remarkable product enriched with over 70% volatile fatty acids.
- A Natural Boost for Immunity: Nature knows best, and so does Hi-Energy Fish. Our product acts as a catalyst, stimulating your plants’ innate immune response. By triggering this natural defense mechanism, you’re not just nurturing your crops; you’re fostering their resilience and vitality.
- The Hi-Energy Advantage: From robust root development to increased harvests and superior quality forages and pastures, your plants respond favorably to the inclusion of Hi-Energy Fish. Our product offers crops a unique blend of compounds that awaken their natural defense mechanisms and foster the growth of essential soil organisms, bolstering overall plant health and nutrient release.
- Optimal Application Rates: Achieving the best results with Elm Dirt Hi-Energy Fish requires a keen understanding of application rates. For acreages, a recommended dosage of 1-3 quarts (1-3 liters) per acre, combined with a 1:10+ dilution at planting, When nurturing transplants or using root drip application methods, a gentle 1:500 dilution is the key to nurturing healthy young plants. Foliar application is an effective way to ensure your crops receive the essential nutrients they crave.
- Our story: At Elm Dirt, we take pride in crafting exceptional organic fertilizers that prioritize both plant health and environmental responsibility. Our Plant fertilizers are carefully developed, keeping in mind the diverse needs of various plants. We are committed to sustainability and supporting local production. That’s why Elm Dirt Plant food is proudly made in the US, adhering to strict quality standards and eco-friendly practices.
Liquid Seaweed Fertilizer for Plants with Soil Activator, Fermented Organic Liquid Kelp Fertilizer for Vegetables, Indoor and Outdoor Plants – Made in USA (8 OZ)
- 🌿 Naturally Fermented Seaweed Power. More than a standard kelp fertilizer: fermentation unlocks seaweed extract for plants with organic acids & enzymes for root vigor, flowering, and stress resilience.
- 🌱 Low-Odor, Wine-Like Aroma. This naturally fermented liquid kelp (seaweed extract for plants) has a clean, gentle scent — ideal for houseplants, seed starting, and balconies; family- and neighbor-friendly.
- 🇺🇸 Proudly Made in the USA: Quality you can trust. Our premium liquid seaweed fertilizer is responsibly sourced, fermented, and packaged in Florida, supporting local agriculture and sustainability.
- 🍅 Visible Results, Gentle Enough for Seedlings. Safe, all-purpose seaweed fertilizer for tomatoes, peppers, cucumbers, berries, roses, hydrangeas, citrus, lawns, and houseplants. Promotes lush growth and plentiful harvests in vegetables, herbs, flowers, trees, shrubs, and ornamental plants. Ideal as an organic probiotic inoculant, improving taste and yield naturally.
- ♻️ 100% Organic and Easy to Use: Safe, non-toxic, and user-friendly. Dilute as directed (1-2 fl oz per gallon for soil drench; 0.5-1 fl oz per gallon for foliar application). Quick absorption ensures immediate results. Store sealed, away from sunlight, and prevent freezing for maximum viability.
Liquid Seaweed Fertilizer for Plants with Soil Activator, Fermented Organic Liquid Kelp Fertilizer for Vegetables, Indoor and Outdoor Plants – Made in USA (32 OZ)
- 🌿 Naturally Fermented Seaweed Power. More than a standard kelp fertilizer: fermentation unlocks seaweed extract for plants with organic acids & enzymes for root vigor, flowering, and stress resilience.
- 🌱 Low-Odor, Wine-Like Aroma. This naturally fermented liquid kelp (seaweed extract for plants) has a clean, gentle scent — ideal for houseplants, seed starting, and balconies; family- and neighbor-friendly.
- 🇺🇸 Proudly Made in the USA: Quality you can trust. Our premium liquid seaweed fertilizer is responsibly sourced, fermented, and packaged in Florida, supporting local agriculture and sustainability.
- 🍅 Visible Results, Gentle Enough for Seedlings. Safe, all-purpose seaweed fertilizer for tomatoes, peppers, cucumbers, berries, roses, hydrangeas, citrus, lawns, and houseplants. Promotes lush growth and plentiful harvests in vegetables, herbs, flowers, trees, shrubs, and ornamental plants. Ideal as an organic probiotic inoculant, improving taste and yield naturally.
- ♻️ 100% Organic and Easy to Use: Safe, non-toxic, and user-friendly. Dilute as directed (1-2 fl oz per gallon for soil drench; 0.5-1 fl oz per gallon for foliar application). Quick absorption ensures immediate results. Store sealed, away from sunlight, and prevent freezing for maximum viability.
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 (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
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 when choosing a fermented fish fertilizer?
Key factors include the NPK ratio, organic certification (such as OMRI listing), odor level, and whether the formula includes additional ingredients like kelp or seaweed. Also consider the concentration (e.g., 5-1-1 versus 2-3-1) and the recommended dilution rates for your garden type. Finally, check the container size to gauge value per ounce.
How does the NPK ratio affect plant performance?
A higher nitrogen (N) level, like the 5-1-1 ratio in Alaska Fish Fertilizer, promotes vigorous leaf growth, while a balanced 2-3-1 ratio, found in Neptune’s Harvest, supports steady overall development and flowering. Choose a ratio that matches the growth stage of your plants—higher N for vegetative growth and more balanced ratios for fruiting or blooming. The right ratio helps avoid nutrient burn and encourages healthy root systems.
Which product has the lowest odor for indoor or balcony gardening?
The Alaska Fish Emulsion (5-1-1 Concentrate) is deodorized with natural wintergreen, making it gentler on the nose than many traditional fish emulsions. The fermented seaweed fertilizers from B0FDN9JPXY and B0FDMXM79R also have a low, wine‑like aroma, which is ideal for indoor use. If odor is a primary concern, these two options are the best choices.
Is there a benefit to choosing a fertilizer that includes kelp or seaweed?
Yes, kelp adds trace minerals, hormones, and organic acids that improve soil microbiology and nutrient uptake, as seen in GS Plant Foods Liquid Fish & Kelp Fertilizer. The fermented seaweed products also provide enzymes and organic acids that boost root vigor and stress resilience. Combining fish nutrients with seaweed can give a more complete, balanced feeding program.
How do the concentrations and recommended dilutions differ among the products?
Concentrated formulas like Alaska Fish Emulsion (5-1-1) require a 1:500 dilution for seedlings and a 1:10+ dilution for mature plants, while the 1‑quart Central Garden Brands product is ready‑to‑use with no further dilution. GS Plant Foods suggests mixing 2 oz per gallon of water, and the Elm Dirt Hi‑Energy Fish recommends a 1:500 to 1:10 dilution depending on application method. Always follow the label to avoid over‑feeding and potential burn.
Which fertilizer offers the best value for large garden beds?
Alaska Fish Emulsion Fertilizer in the 1‑gallon size provides a high volume of product at a lower cost per ounce, making it economical for extensive beds. Elm Dirt Hi‑Energy Fish also offers a high‑energy formula with a recommended 1‑3 quarts per acre, suitable for large acreage. Compare the price per gallon and the recommended application rates to determine the most cost‑effective option.
Are all these fish fertilizers certified for organic gardening?
Most of the listed products are OMRI‑listed or explicitly labeled as 100 % organic, including Alaska Fish Fertilizer, Central Garden Brands, and GS Plant Foods. Neptune’s Harvest and Elm Dirt also market themselves as organic, but verify the certification on the packaging if strict organic compliance is required. Certified organic status ensures the product can be used in certified organic farms and gardens.
Can I use these fertilizers on both vegetables and ornamental plants?
Yes, the majority of the products are formulated for a wide range of plant types, from vegetables and fruits to flowers, trees, and houseplants. For example, Alaska Fish Fertilizer and Central Garden Brands explicitly state suitability for indoor and outdoor plants, while GS Plant Foods highlights use on lawns, shrubs, and ornamentals. Adjust the dilution according to the plant’s sensitivity and growth stage for optimal results.