Comparison: Best Fish Fertilizer On Tomatoes (Updated | Dec 1st)
But with so many fish fertilizers on the market, how do you know which one truly delivers? Whether you’re a backyard gardener or a tomato enthusiast chasing the perfect harvest, this honest comparison will help you choose the best fish fertilizer to feed your tomatoes and grow the garden you’ve always wanted.
- Best for organic fish boost: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for tomato power concentrate: Farmer’s Secret Tomato Booster Fertilizer (32oz) – Super Concentrated – 3:8:7 Ratio Fortified with Humic Acid
- Best for vitamin-rich emulsion: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for odorless nutrient blend: Neptune’s Harvest Fish Fertilizer 2-4-1
- Best for drought-resistant tomato feed: Neptune’s Harvest Tomato & Veg Fertilizer 2-4-2
- Best for trace mineral liquid: Harris Organic Plant and Lawn Fertilizer
- Best for deep green emulsion: Fertilome (10612) Fish Emulsion Fertilizer 5-1-1 (32 oz)
- Best for balanced tomato blend: Down To Earth All Natural Fertilizers Organic All Purpose Tomato & Vegetable Mix – Plant Food for Tomatoes
- Best for compact odorless blend: Neptune’s Harvest Fish Fertilizer 2-4-1
- Best for three-month calcium feed: Miracle-Gro Shake ‘N Feed Tomato
Product Comparison: Best Fish Fertilizer On Tomatoes
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
Farmer’s Secret Tomato Booster Fertilizer (32oz) – Super Concentrated – 3:8:7 Ratio Fortified with Humic Acid, Iron and Calcium – Grow More Tomatoes
- Let our professionally formulated plant food help you grow bigger, juicer and plumper tomatoes in your garden
- Specifically formulated for optimal performance throughout the life cycle on all varieties of tomatoes
- Super, super concentrated – A little goes a LONG way
- Dilute two teaspoons of product into one gallon of water and apply weekly during the whole life cycle
- Farmer’s Secret brings the same scientifically backed formula development process farmers get to YOUR garden… get in on the secret!
- Bottled with pride in Kentucky!
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
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 Tomato & Veg Fertilizer 2-4-2, 1 Gallon
- Helps Increases Vigor And Volume Of Tomatoes And Vegetables
- Ideal For Vegetables, Trees, Shrubs And Flowers
- Nutrients Help Plants Tolerate Drought
- Pet Safe
Harris Organic Plant and Lawn Fertilizer, Hydrolyzed Liquid Fish Fertilizer Emulsion Great for Tomatoes and Vegetables, 3-3-0.3, 32oz (32oz (Quart))
- Uses trace minerals and micronutrients naturally derived from fish
- Promotes vigorous growth of plants and vegetables
- Great for all indoor and outdoor plants
- For use in an Organic Gardening program
- Won’t burn plants
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.
Down To Earth All Natural Fertilizers Organic All Purpose Tomato & Vegetable Mix – Plant Food for Tomatoes, Peppers, Herbs and Flowers 4-6-2, 1 lb
- Balanced Nutrient Profile (4-6-2): Provides nitrogen, phosphorus, and potassium tailored for tomatoes and vegetables.
- Organic & OMRI Listed: Safe and approved for certified organic gardening.
- Supports Healthy Root & Fruit Development: Encourages strong root systems and bountiful, flavorful harvests.
- All Natural Ingredients: Made from sustainably sourced organic materials for soil health.
- Easy to Use: Ideal for garden beds, raised beds, and container plants.
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
Miracle-Gro Shake ‘N Feed Tomato, Fruit and Vegetable Plant Food, For In-Ground and Container Plants, Feeds up to 3 Months, 1 lb.
- Miracle-Gro Shake ‘N Feed Tomato, Fruit & Vegetable Plant Food feeds plants for up to 3 months, and nourishes above and below the soil
- This plant food contains calcium to help form stronger walls, producing better quality and longer-lasting fruits and vegetables
- For use with vegetable, fruit, and tomato plants, whether in-ground or indoor or outdoor container plants
- Apply this garden product evenly onto the soil and work into the top 1-3 inches of soil for in-ground plants, or lightly work into the soil of established container plants; water to start feeding
- Reapply Miracle-Gro Shake ‘N Feed Tomato, Fruit & Vegetable Plant Food every 3 months and water regularly for a beautiful garden all season long
- Now contains natural ingredients that helps feed and nourish above and below soil, for even better quality and longer lasting fruits and vegtables versus unfed plants
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 N‑P‑K ratio should I look for in a fish fertilizer to grow healthy tomatoes?
Tomatoes thrive on a balanced ratio that supplies ample nitrogen for foliage early on and more phosphorus and potassium for fruit set later; a 2‑4‑2 or 3‑8‑7 blend works well. Fish fertilizers typically range from 5‑1‑1 to 2‑4‑2, so choose a formula that leans toward higher phosphorus and potassium as the plants mature.
How does a 5‑1‑1 fish emulsion compare to a 2‑4‑2 blend for tomato production?
A 5‑1‑1 emulsion provides strong nitrogen, encouraging rapid leaf growth, which is useful in the early season but can delay fruiting if over‑applied. A 2‑4‑2 blend supplies more phosphorus and potassium, promoting flower development and larger fruit, making it a better all‑round choice for mature tomato plants.
Are there odor concerns with fish fertilizers, and which brands minimize the smell?
Traditional fish emulsions can have a strong, fishy odor, especially when applied in large volumes. Neptune’s Harvest products use a cold‑process that retains nutrients while reducing scent, and the Alaska Fish Fertilizer is OMRI listed and formulated to be low‑odor, making them good options for indoor or close‑quarter gardening.
Which product gives the best value per ounce for feeding tomatoes?
When evaluating cost per ounce, the Alaska Fish Fertilizer (115 oz) and Central Garden Brands Fish Emul (1 quart ≈ 32 oz) provide large quantities at a lower price point. However, the Farmer’s Secret Tomato Booster is highly concentrated, so a small amount stretches far, offering strong value for gardeners focused solely on tomatoes.
Is an OMRI listing important for organic gardeners growing tomatoes?
Yes, an OMRI listing confirms that the product meets organic certification standards, which is crucial for growers who sell certified organic produce. Both Alaska Fish Fertilizer and Down To Earth All Natural Fertilizer carry the OMRI label, ensuring they can be used in organic production without jeopardizing certification.
How do liquid fish fertilizers differ from dry emulsions in application and effectiveness?
Liquid fish fertilizers dissolve quickly, allowing for easy foliar sprays or soil drench applications, and they deliver nutrients uniformly. Dry emulsions, like Fertilome 5‑1‑1, require mixing with water and may need more vigorous shaking, but they often have a longer shelf life and can be stored without refrigeration.
Can I use a concentrated tomato booster like Farmer’s Secret together with a fish fertilizer?
Yes, you can alternate the two: start with a fish fertilizer for early vegetative growth, then switch to the tomato booster during flowering and fruit set for targeted nutrient spikes. Just be careful to follow label dilution rates to avoid over‑fertilizing, which can cause leaf burn or nutrient lockout.
What key features should I look for in a fish fertilizer to ensure consistent fruit set and disease resistance?
Look for products that include micronutrients such as iron, magnesium, and calcium, as well as organic matter that supports beneficial soil microbes. Formulations that are low‑odor, OMRI listed, and contain a balanced N‑P‑K ratio (like 2‑4‑2) will promote strong root systems, improve fruit quality, and help plants resist common tomato diseases.