Comparison: Best Fish Fertilizer On Grass (Updated | Dec 1st)
If you’ve ever wondered how to give your lawn that lush, green glow without relying on harsh chemicals, you’re not alone. Enter fish fertilizer—a natural powerhouse gaining praise among gardeners and lawn care enthusiasts. But with so many options out there, which one actually delivers the best results for grass? In this article, we’ll break down the top contenders, compare their ingredients, effectiveness, and ease of use, and help you choose the best fish fertilizer to turn your yard into the envy of the neighborhood—naturally.
- Best for organic garden boost: Alaska Fish Fertilizer OMRI Listed 5-1-1
- Best for vitamin rich: CENTRAL GARDEN BRANDS 100099247 Fish Emul Fertilizer
- Best for green sprayer: Superior 15-0-15 Liquid Lawn Fertilizer – Lawn Food for Growth & Green – Nitrogen
- Best for soil microbe boost: GS Plant Foods Liquid Fish & Kelp Fertilizer (1 Gallon) – Organic Material Review Institute Listed Natural Plant Food for Home Gardens
- Best for balanced lawn power: Advanced 16-4-8 Lawn Fertilizer – Liquid Lawn Food Spring & Summer Concentrated Spray – Any Grass Type- Fish and Seaweed Kelp- Balanced NPK – Simple Lawn Solutions (1 Quart)
- Best for wintergreen no burn: Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)
- Best for vibrant veggie growth: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1
- Best for odorless fish power: Neptune’s Harvest Fish Fertilizer 2-4-1
- Best for yield boost emulsion: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for rapid green iron: Scotts Liquid Green Max Lawn Food: 2
Product Comparison: Best Fish Fertilizer On Grass
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
Superior 15-0-15 Liquid Lawn Fertilizer – Lawn Food for Growth & Green – Nitrogen, Potassium, Humic, Fish & Seaweed – Any Grass Type- Simple Lawn Solutions – All Season- Attached Sprayer (32 Ounce)
- 15-0-15 Lawn Fertilizer To Promote Greening, Growth And Turf Hardiness: The Power Of Nitrogen & Potassium Blended With Humic, Fish And Seaweed. Intensify Green And Growth While Providing Key Nutrients For Turf Hardiness.
- Can Be Used On All Grass Types: Lawn Fertilizer For Bermuda Grass, St. Augustine Grass, Zoysia Grass, Tall Fescue, Fine Fescue & Kentucky Bluegrass.
- Liquid Lawn Fertilizer: 15-0-15 Nutrient Ratio Provides Balanced Nutrients For Overall Lawn Vigor. Liquid Fertilizer For Spring, Summer And Fall.
- Nitrogen Lawn Fertilizer: Nitrogen Encourages Vigorous Growth For The Development Of A Dense Green Attractive Lawn. Nitrogen Is The Most Essential Macronutrient For Turf.
- Potassium Fertilizer For Lawns: Potassium Can Enhance The Plant’s Endurance To Stress If A Deficiency Is Present. This Concentrated Liquid Fertilizer Provides Essential Nutrients.
- 15-0-15 Fertilizer Blended With Humic, Fish And Kelp: Our Humic Is Derived From The Highest Quality Humate Source, Leonardite. Our Ascophyllum Nodosum Seaweed Harvested In The Icy North Atlantic.
- Attached Easy To Use Sprayer: 15-0-15 Liquid Lawn Food Comes With An Attached Ready To Use Sprayer. Hook To Your Hose To Apply. Covers 3,200 Square Feet.
- Use Alongside Fertilizer Program. 15-0-15 Liquid Fertilizer Can Be Used With Your Current Fertilizer Program For A Quick Nutrient Uptake.
- Produced In The United States: 15-0-15 Is Manufactured In The United States Of America, By A Family Owned Business With Over 25 Years Of Former Experience In The Commercial Professional Turf Industry.
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.
Advanced 16-4-8 Lawn Fertilizer – Liquid Lawn Food Spring & Summer Concentrated Spray – Any Grass Type- Fish and Seaweed Kelp- Balanced NPK – Simple Lawn Solutions (1 Quart)
- 16-4-8 Liquid Lawn Food Fertilizer: The perfect blend of key macronutrients. This lawn liquid food turf fertilizer also contains Seaweed & Fish
- This complete Nitrogen, Phosphate, and Potash formula gives your grass greening & growth while providing nutrients for lush lawns. Apply 16-4-8 Liquid Fertilizer using a hose end sprayer, backpack sprayer, pump up sprayer or watering can
- Blended with 16% Nitrogen. Nitrogen is a major component of chlorophyll, where lawns get their green coloring. Nitrogen encourages growth for the development of a dense attractive lawn
- Blended with 4% Phosphorus. Phosphorus encourages root development and enhances lawn establishment in early stages
- Blended with 8% Potassium. Potassium can enhance a lawn’s endurance to temperatures and drought if a deficiency is present
- Contains Seaweed and Fish. Seaweed & Fish Emulsion provides rich nutrients to soil for a more effective Lawn Food and optimum nutrient uptake
- Application Rates for Lawn, Garden and Indoor Plants: Versatile Formula can be used on turf grass, ornamentals, young plants, flower beds, potting soil, young trees, garden and hardy plants
- All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Florida Palmetto, Bahia, Fescue, Ryegrass & Kentucky Bluegrass
- Produced In The United States: 16-4-8 is manufactured in the United States of America, by a family-owned business with over 25 years of former experience in the commercial professional turf industry
- Use Alongside Fertilizer Program. 16-4-8 Liquid Fertilizer can be used with your current fertilizer program. Great as a supplement to granular fertilizer programs for a quick plant uptake
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
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, 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
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!
Scotts Liquid Green Max Lawn Food: 2,000 sq. ft., 2-in-1 Fertilizer and Iron Supplement, Use on Any Grass Type, 32 oz.
- Scotts Liquid Green Max Lawn Food is your go-to liquid fertilizer and iron supplement for greening your lawn in just 3 days, so bring on those last-minute barbecues and an outdoor season chock-full of fun
- The dual-action, 2-in-1 formula feeds and supplements with iron to enhance and deepen the green color of your grass
- Apply to any type of grass, from Kentucky Bluegrass to Bermudagrass; for the best results use regularly from early spring through late fall
- A well-fed lawn leads to a green lawn, which cleans air, prevents runoff and soil erosion, and makes the great outdoors even greater
- Application is as easy as connecting your hose to the bottle, pointing the spray nozzle and letting this liquid fertilizer cover up to 2,000 sq ft—no granules, no spreaders, no hassle
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 are the key differences between fish‑based fertilizers and synthetic lawn foods?
Fish‑based fertilizers, like Alaska Fish Emulsion or Neptune’s Harvest, provide organic nitrogen, micronutrients, and beneficial microbes that improve soil health over time. Synthetic products, such as Scotts Green Max, deliver quick‑acting N‑P‑K ratios and often include iron for immediate greening, but they do not enhance soil biology. Choosing between them depends on whether you prioritize long‑term soil health or rapid visual results.
How should I compare NPK ratios when selecting a fertilizer for my lawn?
Look for a higher nitrogen percentage (the first number) to promote lush, green growth; products like Superior 15‑0‑15 and Advanced 16‑4‑8 have strong nitrogen levels. The middle number (phosphorus) supports root development, which is useful for new lawns, while the last number (potassium) aids stress tolerance. Match the ratio to your lawn’s needs: high nitrogen for established lawns, balanced N‑P‑K for establishing or repairing turf.
Is OMRI or OMRI‑listed certification important for home gardeners?
Yes, OMRI‑listed products, such as Alaska Fish Fertilizer and GS Plant Foods Liquid Fish & Kelp, meet strict organic standards, making them safe for certified organic gardens. This certification also assures that the fertilizer contains no prohibited synthetic chemicals. If you garden organically or sell produce as organic, choosing OMRI‑listed options protects your certification.
Which product offers the best value per ounce for a large lawn?
For covering many square feet, liquid concentrates like GS Plant Foods (1 gallon) or Alaska Fish Emulsion (1 gallon) provide the lowest cost per ounce and can be diluted to treat extensive areas. Synthetic options like Scotts Green Max are convenient but often cost more per treated square foot. Calculate the total volume needed for your lawn and compare the price per gallon to determine the most economical choice.
How do I avoid the strong odor commonly associated with fish fertilizers?
Products that are deodorized, such as Alaska Fish Emulsion with natural wintergreen, or those that use cold‑processed fish with retained oils like Neptune’s Harvest, tend to have a milder scent. Diluting the fertilizer according to the label and applying it in the early morning or evening can also reduce odor perception. If odor is a major concern, consider a low‑odor, OMRI‑listed option.
Can I use the same fish fertilizer on both garden vegetables and lawn grass?
Many fish‑based fertilizers are versatile; Alaska Fish Fertilizer and GS Plant Foods are labeled for vegetables, flowers, shrubs, and turf. However, lawn‑specific blends often contain higher nitrogen ratios (e.g., 15‑0‑15) optimized for grass growth, while garden blends may have a more balanced N‑P‑K for fruiting and flowering. Choose a product that matches the primary purpose of the area you are treating.
What application methods work best for liquid fish fertilizers?
Liquid fish fertilizers can be applied as a soil drench, foliar spray, or through a hose‑end sprayer; mixing the recommended amount of concentrate with water ensures even coverage. For lawns, a hose‑end sprayer or backpack sprayer provides quick, uniform distribution. For container plants or beds, a watering can or foliar spray helps the nutrients reach the root zone directly.
How do I evaluate the overall value of a fertilizer beyond price?
Consider the nutrient content (NPK ratio), organic certification, additional ingredients like seaweed or humic acids, and the recommended application rate. Products that include micronutrients and support soil microbiology, such as GS Plant Foods, can improve plant health and reduce the need for extra inputs. Balancing cost with these performance benefits helps you select a fertilizer that delivers long‑term value.