Comparison: Best Fish Fertilizer For Roses (Updated | Dec 1st)
If you’re looking to give your roses that lush, vibrant glow, you might be surprised at the power of fish fertilizer. It’s natural, nutrient-rich, and beloved by gardeners who want blooms that truly pop. But with so many options out there—from liquid concentrates to odor-controlled blends—how do you know which one’s best for your prized roses? We’ve dug into the top contenders, testing for effectiveness, ease of use, and results, so you can feed your flowers with confidence and watch them thrive like never before.
- Best for all-natural boost: Heirloom Roses Founder’s Fish Fertilizer – Plant Food for Plants
- Best for vitamin-rich formula: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for dual pack power: Founder’s Fish Fertilizer by Heirloom Roses – (2-Pack)
- Best for omri certified: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for pure plant food: Heirloom Roses Founder’s Fish Fertilizer – All Natural Plant Food for Plants
- Best for bloom-boost blend: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1
- Best for odorless cold-process: Neptune’s Harvest Fish Fertilizer 2-4-1
- Best for rose bloom combo: Neptune’s Harvest Organic Plant Fertilizer | Liquid Fertilizer for Lawn
- Best for cold-pressed power: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for salmon omega boost: Bloom City Organic Wild Fish Fertilizer and Plant Supplement
Product Comparison: Best Fish Fertilizer For Roses
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
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
Founder’s Fish Fertilizer by Heirloom Roses – (2-Pack)
- Great For All Plant Types
- Organic
- Easy Application
- Won’t Burn Plants
- Long Lasting
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
Heirloom Roses Founder’s Fish Fertilizer – All Natural Plant Food for Plants, Natural Liquid Emulsion Fertilizer, One Gallon Garden Fertilizers for Rose Flower and Tomato Outdoor Gardening
- Great For All Plant Types
- All Natural
- Easy Application
- Won’t Burn plants
- Plant Fertilizer
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
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
Neptune’s Harvest Organic Plant Fertilizer | Liquid Fertilizer for Lawn, Garden & Houseplant | Rich in Essential Nutrients | Rose & Flowering 2-4-2 (Quart) + Fish & Seaweed Plant Food 2-6-4 (Quart)
- Combine for Maximum Growth: Pair Neptune’s Harvest Rose & Flowering Plant Fertilizer with the Fish & Seaweed Fertilizer for enhanced plant vitality! This powerful combination of organic plant food strengthens roots, improves soil health, and promotes vibrant blooms; boosting flower production, enhancing foliage, and ensuring robust plant growth for beautiful, long-lasting flowers and healthy, resilient plants throughout the growing season
- Organic Nutrients for Roses & Flowers: This Rose & Flowering Plant Fertilizer is a 2-6-4 natural fertilizer made from fish, seaweed, and other organic ingredients; Designed to promote vibrant blooms and robust plant health, this eco-friendly formula boosts flower production and strengthens plants during all stages of growth
- How to Use Rose & Flowering Fertilizer: Apply this organic plant fertilizer during the growing season by mixing the concentrate with water as directed and applying directly to the soil; For best results, reapply every 2-4 weeks, ensuring your roses and flowering plants receive continuous nourishment for optimal growth and blooms
- Organic Fish & Seaweed Fertilizer for Vegetables & Flowers: This 2-3-1 natural fertilizer is made from organic fish hydrolysate and seaweed; It is designed to nourish plants during active growth stages; this eco-friendly formula promotes stronger roots, lush foliage, and abundant, longer-lasting blooms
- How to Use Fish & Seaweed Fertilizer: Apply this organic plant fertilizer during active growth stages; mix the concentrate with water as directed and apply directly to the soil or use as a foliar spray until leaves are wet, top and bottom; reapply every 2-3 weeks throughout the growing season for continuous nourishment, ensuring stronger roots, vibrant foliage, and healthier plants
- Package Contents: 1 Unit of Neptune’s Harvest Rose & Flowering Plant Fertilizer 2-4-2 (Quart) + (1) Neptune’s Harvest Fish & Seaweed Plant Fertilizer 2-6-4 (Quart)
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!
Bloom City Organic Wild Fish Fertilizer and Plant Supplement, Great for Roots and Soil, Made from Sustainable Salmon, Quart (32 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.
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 essential nutrients do fish fertilizers supply that benefit rose health?
Fish fertilizers are rich in nitrogen, phosphorus, and potassium, plus a full spectrum of micronutrients, amino acids, and growth hormones. These elements promote strong root development, vigorous foliage, and abundant, long‑lasting blooms. The organic nature also supports beneficial soil microbes that improve nutrient uptake for roses.
How does the NPK ratio influence rose growth, and which product has a rose‑friendly balance?
A balanced NPK ratio, such as 2‑3‑1 or 2‑4‑1, provides enough nitrogen for leaf growth while supplying phosphorus and potassium for flower formation and root strength. Neptune’s Harvest Fish Fertilizer 2‑4‑1 (36 oz) offers a slightly higher phosphorus level, which can boost bloom production on roses. For a more moderate approach, the 2‑3‑1 formulas from Heirloom Roses Founder’s Fish Fertilizer work well for steady, all‑round development.
Do fish fertilizers differ in odor, and should that affect my purchase?
All genuine fish‑based fertilizers have a noticeable fishy smell, especially concentrated liquids like the 1‑gallon Organic Fish Emulsion. The odor is a sign of real fish ingredients; however, products that undergo cold‑press processing, such as Neptune’s Harvest, tend to have a milder scent. If indoor use is a concern, choose a low‑odor option or dilute the fertilizer according to the label to reduce the smell.
Which fish fertilizer is OMRI listed, and why is that certification important for organic gardeners?
Alaska Fish Fertilizer OMRI Listed 5‑1‑1 carries the OMRI certification, confirming it meets the National Organic Program standards. This certification assures organic growers that the product contains no prohibited synthetic chemicals and can be used in certified organic rose gardens. It also provides confidence that the fertilizer supports sustainable farming practices.
What are the pros and cons of liquid versus emulsion fish fertilizers for feeding roses?
Liquid fish fertilizers, like Heirloom Roses Founder’s Fish Fertilizer, dissolve quickly and can be applied as a soil drench or foliar spray for rapid nutrient uptake. Emulsion products, such as Central Garden Brands Fish Emul, are thicker, offering slower release and reduced runoff, which can be advantageous for mulched beds. Choose liquid for fast results and ease of mixing, or emulsion for longer‑lasting feeding and less frequent applications.
How should I determine the proper concentration and dilution rate for my rose bushes?
Start with the manufacturer’s recommended dilution—typically 1 ounce of concentrate per gallon of water—for mature roses. Younger plants or newly planted roses benefit from a half‑strength mix to avoid nutrient burn. Adjust the strength based on visual cues: dark green foliage indicates sufficient nitrogen, while overly rapid growth may signal the need for a lighter solution.
Which fish fertilizer gives the best value per ounce for feeding roses?
The 1‑gallon Organic Fish Emulsion Fertilizer provides the lowest cost per ounce, delivering a high‑nutrient formula suitable for large rose gardens. Neptune’s Harvest 2‑4‑1 (36 oz) offers a competitive price with a premium cold‑processed blend that retains more amino acids. For budget‑conscious gardeners, the Heirloom Roses Founder’s 2‑Pack gives a decent balance of price and performance.
Can I use the same fish fertilizer on both roses and vegetable crops without issues?
Yes, most fish fertilizers are versatile and safe for both ornamental and edible plants because they supply universal macro and micronutrients. Products labeled as all‑purpose, like Central Garden Brands Fish Emul and Bloom City Organic Wild Fish Fertilizer, are formulated for a wide range of crops. Just follow the specific dilution guidelines for each plant type to avoid over‑feeding.