Comparison: Best Fish Emulsion Fertilizer For Flowers (Updated | Dec 1st)
If you’re looking to give your flowers a natural boost, fish emulsion fertilizer is a tried-and-true favorite among gardeners. But with so many options out there, how do you know which one delivers the best results? We’ve dug into the top contenders—examining nutrient content, smell levels, ease of use, and real garden performance—to help you choose the best fish emulsion for vibrant, blooming flowers. No guesswork, just honest insights from soil to petals. Let’s find the perfect feed for your flourishing garden.
- 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 cold pressed: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for vitamin boost: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for salmon nutrients: Fish Emulsion Fertilizer
- Best for deep green growth: Fertilome (10611) Fish Emulsion Fertilizer 5-1-1 (16 oz)
- Best for low odor powder: Fish Emulsion Fertilizer 12-2-2 Powder (3.3 pounds Powder-Up to 300 Gallons of Water)
- Best for bulk green boost: 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 fast acting kelp: Down To Earth All Natural Fertilizers Organic Liquid Fish & Kelp Concentrate – Plant Food for Vegetable Gardens and Flower Beds – Makes up to 32 Gallons 2-4-1
Product Comparison: Best Fish Emulsion Fertilizer For Flowers
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
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!
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
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
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.
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 (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.
Down To Earth All Natural Fertilizers Organic Liquid Fish & Kelp Concentrate – Plant Food for Vegetable Gardens and Flower Beds – Makes up to 32 Gallons 2-4-1, 32 oz
- Fast‑acting liquid formula: Perfect for foliar feed or soil drench applications, supporting quick absorption and growth stimulation.
- Stimulates overall plant vigor: High phosphorus aids flowering and fruiting, while nitrogen supports lush foliage and root development.
- Organic & soil‑friendly: Helps promote beneficial microbial activity and sustainable soil health due to its fish and kelp base
- Versatile application rates: For general garden use: ¼–½ cup per gallon of water; for containers: 2–4 Tbsp per gallon; for houseplants: 2 Tbsp per gallon, repeated every 2–4 weeks depending on growth stage
- Watch out for odor: While extremely effective, many users report a strong fish-like odor characteristic of fish emulsions—though it typically subsides quickly and doesn’t linger long indoors
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 NPK ratio should I look for in a fish emulsion fertilizer for flowering plants?
Flowering plants generally benefit from a higher phosphorus level, so a ratio like 2-3-1 or 5-1-1 works well for promoting blooms. The 12-2-2 powder provides extra nitrogen for vigorous foliage but may delay flowering if over‑used. Choose a formula that balances nitrogen for growth with enough phosphorus to support flower development.
How important is odor when selecting a fish emulsion fertilizer?
Odor is mainly a matter of personal comfort; deodorized products such as Alaska’s 5‑1‑1 concentrate use natural wintergreen to mask the fish smell. Pure fish emulsion, like the 1‑gallon organic option, has a strong fishy aroma that indicates authenticity but can be off‑putting indoors. If you garden in a confined space, a low‑odor formula may be preferable.
Should I buy a liquid fish emulsion or a powdered version?
Liquid emulsions are ready to mix and are convenient for quick foliar sprays or soil drenches, while powders like the 12‑2‑2 concentrate are highly concentrated, reduce storage space, and have a milder smell. Powdered forms require dilution but can stretch further, making them cost‑effective for large beds. Consider your application method and how often you plan to fertilize when choosing between the two.
What does an OMRI listing mean for a fish fertilizer?
OMRI (Organic Materials Review Institute) certification confirms that the product meets organic standards and can be used in certified organic gardens. Products such as Alaska Fish Fertilizer OMRI Listed and GS Plant Foods Liquid Fish & Kelp carry this seal, giving peace of mind to growers who follow organic practices. It does not directly affect performance, but it ensures the formula is free from prohibited synthetic chemicals.
How can I assess the value of a fish emulsion product?
Value is best measured by the amount of usable fertilizer per dollar, taking concentration into account. For example, a 1‑gallon concentrate will cover many more gallons of water than a 8‑oz bottle, even if the price per ounce is higher. Compare the recommended dilution rates and total coverage to determine which product gives you the most feed for your budget.
Which fish emulsion is best suited for indoor houseplants?
Indoor growers often prefer low‑odor, gentle formulas such as the Alaska 5‑1‑1 concentrate, which is deodorized and labeled “Will Not Burn.” The 8‑oz Fish Emulsion Fertilizer (Complete Fish Emulsion Plant Food) is also small enough for occasional indoor use without creating a strong smell. Apply at the lower end of the dilution range to avoid over‑feeding houseplants.
How often should I apply fish emulsion to get the most flower blooms?
Most fish emulsions work best with frequent, light applications—typically every 2–4 weeks during the growing season. A 1‑2 tablespoon per gallon of water schedule for foliage and a slightly higher rate for soil drenches will keep nutrients steady without causing burn. Adjust frequency based on plant response; if growth slows, increase the interval slightly.
Is there a risk of burning my plants with fish emulsion fertilizer?
Fish emulsions are generally gentle and labeled “Will Not Burn,” but over‑concentration can still cause leaf scorch, especially on young seedlings. Always follow the manufacturer’s dilution instructions and start with the weakest recommended mix. Monitoring plant response after each application helps you avoid accidental burn.