Comparison: Best Fish Fertilizer For Carrots (Updated | Dec 1st)
If you’re growing carrots, you already know they need rich, well-fed soil to thrive—but not all fertilizers deliver the right nutrients without compromising flavor or texture. Enter fish fertilizer: a natural powerhouse packed with nitrogen, phosphorus, and trace minerals that carrots love. But with so many options on the market, which one actually gives you the sweetest, crunchiest harvest? In this article, we’ll compare the top fish fertilizers for carrots, weighing smell, nutrient content, ease of use, and real garden results—so you can feed your soil with confidence.
- Best for vitamin-rich emulsion: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for omri certified blend: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for kelp-boosted carrots: Big A Carrot Fertilizer and Root Vegetable Fertilizers – Premium Fertilizer for Carrots and Vegetable Garden – Organic Plant Food for Indoor and Outdoor Plants
- Best for deep green formula: Fertilome (10612) Fish Emulsion Fertilizer 5-1-1 (32 oz)
- Best for carrot root optimizer: Liquid Power Carrots Fertilizer – Professional Liquid Plant Food for Carrots – Fast-Acting Concentrate for Growth
- Best for odorless protein: Neptune’s Harvest Fish Fertilizer 2-4-1
- Best for seaweed boost: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1
- Best for eco-friendly drip: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for wintergreen deodorized: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for low-odor hydrolysate: Fish Hydrolysate Fertilizer for Vegetables & Plants – NPK 2-3-2 Fish Emulsion for Lawn
Product Comparison: Best Fish Fertilizer For Carrots
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
Big A Carrot Fertilizer and Root Vegetable Fertilizers – Premium Fertilizer for Carrots and Vegetable Garden – Organic Plant Food for Indoor and Outdoor Plants
- Grow a Rich Garden: Big A Carrot Fertilizer, your ultimate organic vegetable fertilizer, guarantees a flourishing harvest for all your vegetables, with a special emphasis on carrots. Maintaining 100% organic integrity and enriched with essential nutrients, this fertilizer for vegetable gardens is specifically designed for a thriving garden, ensuring both productivity and safety.
- Unique Nutritious Blend: Our organic fertilizer for vegetables boasts a pioneering blend, featuring the exclusive inclusion of kelp. This proprietary mix enhances the growth of carrots and other root vegetables, ensuring they are not only larger but also more flavorful and nutritious. It is both a potent phosphorus fertilizer for plants as well as a potassium fertilizer and it actively supports optimal plant development, resulting in robust yields. This organic potassium fertilizer not only work
- Contains All the Nutrients: A comprehensive solution, the Big A Carrot Fertilizer, fortified with kelp, provides major nutrients such as nitrogen and phosphorus, coupled with secondary nutrients—calcium and magnesium. This vegetable fertilizer for a garden ensures a holistic approach to plant growth, guaranteeing rich and healthy yields.
- Perfect for All Veggies and Fruits: Tailored for a variety of crops, our vegetable fertilizer stands out in nurturing diverse vegetables and fruits, including carrots, yams, beets, onions, and more. An ideal garden fertilizer for outdoor vegetables, it actively promotes the growth of your favorite produce.
- Highly Soluble Formula: The highly-soluble powder formula of Big A Carrot Fertilizer facilitates rapid nutrient absorption, ensuring essential elements reach the roots swiftly. Its user-friendly application directly to the soil before seeding guarantees a seamless gardening experience, making it the go-to choice for a hassle-free and successful harvest. Whether it is a vegetable fertilizer for outdoors or an indoor fertilizer you need, Big A Carrot fertilizer serves both purposes.
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.
Liquid Power Carrots Fertilizer – Professional Liquid Plant Food for Carrots – Fast-Acting Concentrate for Growth, Strong Roots & High-Yield Harvest – 8 oz – Indoor & Outdoor Use
- 🥕 FORMULATED SPECIFICALLY FOR CARROT ROOT GROWTH – Gardenera LIQUID POWER Carrots Fertilizer promotes straight, smooth, and vibrant orange carrots by delivering essential nutrients that target strong root elongation and uniform development. Works with all carrot varieties including Nantes, Imperator, and Danvers.
- 🌱 BALANCED NPK FOR ROOT CROPS – Features reduced nitrogen to prevent excess foliage, with elevated phosphorus and potassium to support deep root penetration, flavor concentration, and enhanced nutrient density.
- 🧪 LOW pH TO INCREASE MICRONUTRIENT UPTAKE – Helps unlock bound iron, zinc, boron, and manganese by lowering soil pH—critical for consistent carrot growth, vibrant color, and disease prevention.
- 💧 IMPROVES MOISTURE MANAGEMENT IN ROOT ZONES – Organic acids enhance water retention and stimulate thicker root hairs, reducing cracking and boosting carrot resilience in sandy or dry soils.
- 🌿 ENCOURAGES STRONG, HEALTHY FOLIAGE – Produces compact, upright foliage that aids in photosynthesis and sugar translocation to the roots without diverting too much energy from the edible portion.
- ⚡ QUICK-ABSORBING LIQUID FORMULA – Delivers faster results than granular fertilizers, especially during peak nutrient demand—great for mid-season feeding and correcting deficiencies.
- 📦 IDEAL FOR GARDENS, CONTAINERS & ROW PLANTING – Suitable for backyard beds, planter boxes, and market rows. Perfect for raised bed gardeners and homestead growers aiming for high-quality carrots.
- 🛡️ HELPS PREVENT SPLITTING & FORKED ROOTS – Optimized nutrition minimizes deformities by supporting steady growth and uniform nutrient distribution through the soil.
- 🇺🇸 USA-MADE & SAFE FOR EDIBLE CROPS – Manufactured with clean, eco-conscious ingredients under rigorous standards. Safe to use around pets, pollinators, and food crops.
- 🧴 EASY TO MIX AND APPLY – Just dilute in water and apply via root drench or foliar spray. Works great in drip irrigation systems and foliar feeding regimens.
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
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
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!
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
Fish Hydrolysate Fertilizer for Vegetables & Plants – NPK 2-3-2 Fish Emulsion for Lawn, Flowers, Fruits & Vegetables in Garden or Farm (16 fl oz)
- Rich in amino acids and nutrients
- Natural and eco-friendly
- Boosts plant growth and vitality
- Works both as soil drench & foliar spray
- helps add organic matter to soil
- Will not burn plants, no bad odor
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 is ideal for growing carrots and which fish fertilizers on the list match it?
Carrots thrive with a lower nitrogen and higher phosphorus and potassium ratio, typically around 2-3-2 to 5-1-1, to promote root development over foliage. The Liquid Power Carrots Fertilizer offers a reduced nitrogen formula designed for carrots, while Fertilome (5-1-1) and Alaska Fish Emulsion (5-1-1) also provide suitable ratios for strong root growth.
Should I choose a liquid fish fertilizer or a powdered/fine granular one for carrots?
Liquid fertilizers, like Liquid Power Carrots Fertilizer and the 1‑gallon Organic Fish Emulsion, penetrate the soil quickly and are easy to apply as a drench, which helps carrots absorb nutrients uniformly. Powdered options such as Big A Carrot Fertilizer dissolve rapidly and are great for pre‑plant soil mixes, but they require careful mixing to avoid clumping.
Are there fish fertilizers that minimize the typical fishy odor, and which products are best for indoor or close‑quarter gardening?
Yes, several products are formulated to reduce odor. Alaska Fish Emulsion (5‑1‑1 Concentrate) is deodorized with natural wintergreen, and Neptune’s Harvest Fish Fertilizer uses a cold‑process that retains nutrients while eliminating strong smells, making both suitable for indoor or patio gardens.
Which of these fertilizers are OMRI listed and safe for certified organic gardening?
The Alaska Fish Fertilizer OMRI Listed 5‑1‑1 and the 1‑gallon Organic Fish Emulsion both carry OMRI certification, confirming they meet organic standards. Neptune’s Harvest and the Central Garden Brands fish emulsion are also 100 % organic, though they do not specifically display OMRI listing.
How do the prices and concentrations compare, and which option gives the best value per application?
Concentrated products like Alaska Fish Emulsion (1 gallon) and Fertilome (5‑1‑1) provide many gallons of diluted feed, offering lower cost per use. Smaller containers such as Neptune’s Harvest (18 oz) are convenient but require more frequent repurchasing, so for larger carrot beds the gallon‑size emulsions generally deliver the best value.
Do any of these fertilizers include extra micronutrients or pH‑adjusting features that benefit carrot growth?
Liquid Power Carrots Fertilizer lowers soil pH slightly to improve iron, zinc, and manganese uptake, which is essential for vibrant orange carrots. Neptune’s Harvest retains natural fish proteins and oils that supply a broad spectrum of micronutrients, while Big A Carrot Fertilizer adds kelp for additional trace elements and a mild acidifying effect.
What application methods work best for carrots, and which products are most versatile for those methods?
Carrots respond well to both soil drench and seed‑bed incorporation. Liquid formulas like the 1‑gallon Organic Fish Emulsion and Liquid Power Carrots Fertilizer can be mixed with water for drenching, while powdered options such as Big A Carrot Fertilizer are ideal for mixing directly into the planting trench. Several products, including Fertilome and Alaska Fish Emulsion, list clear mixing ratios for both foliage and root applications, offering flexibility.