Comparison: Best Fish Fertilizer Price (Updated | Dec 1st)
If you’re looking to give your garden a natural boost, fish fertilizer is a top contender—but with so many options out there, how do you know which delivers the best value? We’ve dug into the details to compare the most popular fish fertilizers, weighing effectiveness against price. Whether you’re a seasoned gardener or just starting out, finding the sweet spot between quality and cost matters.
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 fresh: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for aquarium plant boost: API LEAF ZONE Freshwater Aquarium Plant Fertilizer 8-Ounce Bottle
- Best for sustainable yield booster: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for deep green foliage: Fertilome (10612) Fish Emulsion Fertilizer 5-1-1 (32 oz)
- 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 odorless protein power: Neptune’s Harvest Fish Fertilizer 2-4-1
- Best for salmon nutrient blend: Fish Emulsion Fertilizer
- Best for root-boost bone meal: Down To Earth All Natural Fertilizers Organic Fish Bone Meal – High Phosphorus Plant Food for Buds
Product Comparison: Best Fish Fertilizer Price
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
API LEAF ZONE Freshwater Aquarium Plant Fertilizer 8-Ounce Bottle
- Product Type: ARTIFICIAL PLANT
- Package length: 19.558 cm
- Package width: 3.048 cm
- Package height: 4.572 cm
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.
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.
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
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
Down To Earth All Natural Fertilizers Organic Fish Bone Meal – High Phosphorus Plant Food for Buds, Bulbs, Blooms, Flower Beds 4-12-0, 5 lb
- Water-Soluble Formula – Easily dissolves in water for quick absorption and efficient nutrient delivery directly to the root zone
- Targets Root Development – Formulated to enhance root growth, improving plant stability, nutrient uptake, and drought resistance
- Fast-Acting Nutrients – Provides immediate access to essential nutrients like nitrogen, phosphorus, and potassium where roots need them most.
- Ideal for Transplants & Seedlings – Great for jumpstarting young plants or helping transplants establish quickly in new soil.
- Improves Soil-Root Interaction – Encourages a healthy rhizosphere, boosting microbial activity and root-zone nutrient cycling.
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 look for in a fish fertilizer?
Fish fertilizers typically provide a balanced N-P-K ratio, often around 5-1-1 or 2-3-1, which supports leaf growth, root development, and overall plant health. Look for additional micronutrients, vitamins, and amino acids that improve soil microbiology. Products like the Central Garden Brands Emulsion (5-1-1) and GS Plant Foods Liquid Fish & Kelp (2-3-1) clearly list these ratios.
How does the odor of a fish fertilizer affect its usability?
A strong fishy smell can be off‑putting indoors, but it usually indicates a genuine, undiluted fish emulsion. Some brands, such as Neptune’s Harvest, use a cold‑process that reduces odor while retaining nutrients. If you need a low‑odor option for indoor use, consider deodorized formulas like Alaska Fish Emulsion with natural wintergreen.
Is OMRI certification important for organic gardeners?
Yes, OMRI (Organic Materials Review Institute) certification ensures the product meets strict organic standards and can be used in certified organic farms. Both Alaska Fish Fertilizer (5-1-1) and GS Plant Foods Liquid Fish & Kelp carry this certification. Choosing OMRI‑listed fertilizers helps maintain organic integrity and avoids synthetic additives.
Which product offers the best value per ounce for large gardens?
For large‑scale applications, a gallon‑size product provides the lowest cost per ounce. The 1‑gallon Organic Fish Emulsion (2-3-1 NPK) and the Alaska Fish Emulsion 1‑gallon concentrate both deliver high volume at competitive pricing. Compare the total nutrient content and recommended application rates to calculate exact cost per square foot.
How do liquid fish fertilizers compare to powdered or granular options?
Liquid fish fertilizers, like Central Garden Brands Emulsion and GS Plant Foods Liquid Fish & Kelp, are quickly absorbed and easy to mix with water for foliar sprays or soil drenches. Powdered or granular forms, such as Fertilome 5-1-1, require more mixing effort and may release nutrients slower. Choose liquids for fast results and precise dosing, especially on indoor plants.
Can I use fish fertilizer on both indoor and outdoor plants?
Most fish emulsions are safe for indoor and outdoor use because they are 100 % organic and burn‑free. Products such as Alaska Fish Fertilizer and Central Garden Brands specifically state suitability for all plant types. Just follow dilution guidelines to avoid over‑application, especially in confined indoor spaces.
What additional benefits do fish‑and‑kelp blends provide?
Kelp adds trace minerals, hormones, and natural growth stimulants that complement the nitrogen‑rich fish emulsion. GS Plant Foods Liquid Fish & Kelp combines these to improve soil microbiology and nutrient uptake, leading to stronger root systems. This dual‑action formula can boost yields and flower production more than fish‑only products.
How should I calculate the correct dilution rate for my garden size?
Start by checking the label for the recommended amount per gallon of water—common rates are 1‑2 tablespoons per gallon for vegetables and 4 tablespoons per gallon for trees. Multiply that by the total gallons of water you plan to apply to each area. Adjust based on plant maturity; seedlings need a weaker solution, while mature plants can handle a stronger mix.