Comparison: Best Fish Fertilizer Flowers (Updated | Dec 1st)
If your garden could talk, it’d probably beg for a boost—and that’s where fish fertilizer comes in. Packed with nutrients and loved by organic growers, it’s a game-changer for blooming flowers. But not all fish fertilizers are created equal. We’ve dug into the smelly details to find which ones truly make your petunias pop and your roses radiate. From scent strength to visible results, we’re comparing the top contenders so you can skip the guesswork and give your flowers the feast they deserve. Let’s find your garden’s perfect match.
- Best for omri certified boost: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for vitamin-rich boost: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for sustainable cold-press: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for all-purpose versatility: Fish & Seaweed Fertilizer (2-3-1) | All Purpose Liquid Plant Food for Indoor Plants & Outdoor Garden
- Best for bloom-boosting blend: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1
- Best for fish-guano transplant: 7265 Fish & Guano Liquid Plant Fertilizer for Transplants and Flowers
- Best for omega-rich power: Bloom City Organic Wild Fish Fertilizer and Plant Supplement
- Best for roses’ natural boost: Heirloom Roses Founder’s Fish Fertilizer – Plant Food for Plants
- Best for seaweed soil enhancer: GS Plant Foods Liquid Fish & Kelp Fertilizer (1 Gallon) – Organic Material Review Institute Listed Natural Plant Food for Home Gardens
- Best for wintergreen deodorized blend: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
Product Comparison: Best Fish Fertilizer Flowers
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
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 & Seaweed Fertilizer (2-3-1) | All Purpose Liquid Plant Food for Indoor Plants & Outdoor Garden, Vegetables & Flowers | All-Natural Fish & Seaweed Formula Potted Plants & Garden Flowers (8 oz)
- ALL-PURPOSE PLANT FOOD FOR GARDEN & HOME: One versatile solution! Ideal liquid fertilizer for vegetables promoting yield, powerful flower fertilizer for vibrant blooms, effective indoor plants fertilizer, and general garden fertilizer for trees, shrubs, and containers.
Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1, 18 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
7265 Fish & Guano Liquid Plant Fertilizer for Transplants and Flowers, 32 oz (1-Pack)
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.
Heirloom Roses Founder’s Fish Fertilizer – Plant Food for Plants, Organic Liquid Emulsion Fertilizer, Garden Fertilizers for Rose Flower and Tomato Outdoor Gardening
- All Natural
- Easy Application
- Won’t Burn Plants
- Long Lasting
- Promotes Robust Plant Health
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.
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
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
Which fish fertilizer has the best NPK ratio for promoting vibrant flower blooms?
For flowering plants, a 2-3-1 NPK ratio is ideal because it supplies extra phosphorus for bloom development. Both the Neptune’s Harvest Fish & Seaweed Fertilizer and the 1‑gallon Organic Fish Emulsion (B09FZTPQJL) use a 2-3-1 blend, making them top choices for flower lovers. The Alaska Fish Fertilizer (5‑1‑1) is lower in phosphorus, so it’s better suited for general growth rather than intense blooming.
Do any of these fertilizers have an OMRI listing for organic gardening?
Yes, the Alaska Fish Fertilizer (B0DQ2LNX35) and the GS Plant Foods Liquid Fish & Kelp Fertilizer (B00BBLMXVQ) are both OMRI listed, guaranteeing they meet organic standards. The Central Garden Brands Fish Emulsion and the Bloom City Wild Fish Fertilizer are also 100 % organic, though they do not carry the OMRI certification. If OMRI compliance is a priority, stick with the Alaska or GS Plant Foods options.
Which product offers the best value per ounce for indoor and outdoor use?
The 1‑gallon Organic Fish Emulsion (B09FZTPQJL) provides the most nutrients for the lowest cost per ounce, and its 2‑3‑1 ratio works well for a wide range of plants. The Alaska Fish Emulsion (B002RH0B26) also comes in a gallon size and is deodorized, but its 5‑1‑1 ratio is less balanced for flowering. For pure value and versatility, the 1‑gallon Organic Fish Emulsion is the strongest contender.
I’m concerned about the smell of fish fertilizer. Which options are least odorous?
Alaska Fish Emulsion (B002RH0B26) is deodorized with natural wintergreen, making it one of the least pungent choices. The Central Garden Brands Fish Emulsion (B000BX4QGK) also claims a low‑odor formula, though it is not explicitly deodorized. If you prefer a completely neutral scent, the OMRI‑listed Alaska product is your best bet.
Can I use these fertilizers as a foliar spray for quick nutrient uptake?
Both the 1‑gallon Organic Fish Emulsion (B09FZTPQJL) and the GS Plant Foods Fish & Kelp Fertilizer (B00BBLMXVQ) are formulated for foliar application, allowing rapid absorption of nutrients. The Neptune’s Harvest Fish & Seaweed Fertilizer (B009HLVIY0) can also be sprayed, but it is marketed more for soil drenching. For the most flexible use, choose a product that explicitly mentions foliar spray in its directions.
Which fertilizer supports soil microbiology the most?
The GS Plant Foods Liquid Fish & Kelp Fertilizer highlights its ability to improve soil microbiology and nutrient uptake, thanks to seaweed and fish hydrolysate. The Central Garden Brands Fish Emulsion also claims to stimulate beneficial microorganisms. If enhancing the soil ecosystem is a priority, the GS Plant Foods option offers the most detailed support.
How do the concentrations differ, and does that affect how often I need to apply?
Products with a higher NPK ratio, like the 2‑3‑1 formulations, are typically more concentrated and can be applied less frequently—usually every 2‑4 weeks. The 5‑1‑1 Alaska fertilizer is milder, so growers often apply it every 1‑2 weeks for steady growth. Always follow the label’s dilution instructions to avoid over‑feeding and potential burn.
Is there a clear “best overall” fish fertilizer for both flowers and vegetables?
Considering nutrient balance, organic certification, odor control, and value, the 1‑gallon Organic Fish Emulsion (B09FZTPQJL) stands out as the most well‑rounded choice. It offers a 2‑3‑1 ratio ideal for flowers, is fully organic, and provides a large quantity at a reasonable price. For gardeners who need OMRI certification, the Alaska Fish Fertilizer (B0DQ2LNX35) is a close second.