Comparison: Best Liquid Seaweed And Fish Emulsion (Updated | Dec 1st)
If your garden’s craving a natural boost, you’ve probably heard about liquid seaweed and fish emulsion. But which one delivers the best results? We’ve dug into the science, tested both in real gardens, and compared their benefits side by side. Spoiler: both are great, but one might just be perfect for your soil’s needs. Let’s break it down—no green thumb required.
- Best for vibrant bloom boost: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1 (36 Ounce)
- Best for cold-pressed power: 1 Gallon Organic Fish Emulsion Fertilizer for Plants – Ideal Liquid Fish Fertilizer for Plants
- Best for mini bloom boost: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1
- Best for gallon growth fuel: Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1 (Gallon)
- Best for versatile indoor/outdoor: Fish & Seaweed Fertilizer (2-3-1) | All Purpose Liquid Plant Food for Indoor Plants & Outdoor Garden
- Best for omri certified yield: Omri Listed Fish & Kelp Fertilizer for Plants by GS Plant Foods (36oz) – Organic Fertilizer for Vegetables
- Best for concentrated dual-action: Indian River Organics Fish Plus Kelp Seaweed 128 oz. Concentrate
- Best for premium kelp blend: Age Old Fish and Seaweed Liquid Fertilizer
- Best for hi-energy salmon power: Elm Dirt Fish Emulsion Fertilizer – High Energy Liquid Fertilizer for Plants 2-3-0 | Increase Biological Activity & Improve Nutrients
Product Comparison: Best Liquid Seaweed And Fish Emulsion
Neptune’s Harvest Fish & Seaweed Fertilizer 2-3-1 (36 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!
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 & Seaweed Fertilizer 2-3-1 (Gallon)
- 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
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.
Omri Listed Fish & Kelp Fertilizer for Plants by GS Plant Foods (36oz) – Organic Fertilizer for Vegetables, Trees, Lawns, Shrubs, Flowers, Seeds & Plants – Hydrolyzed Fish and Seaweed Blend
- OMRI ORGANIC LISTED FISH AND SEAWEED BLEND: GS Plant Foods all-natural liquid fish is a high quality organic product that gives excellent plant growth, rebuilds soil, and offers higher production yields. Kelp is often applied to any type of plants, trees, lawns, flowers, vegetables and seeds without concern for harmful runoff.
- OPTIMAL PLANT GROWTH & HEALTH AT HOME OR COMMERCIALLY: Used in low concentrations, liquid seaweed fertilizer acts as an efficacious growth promoter. GS Plant Foods fish seaweed fertilizer is used extensively on a commercial basis, as well as at home for gardeners as an organic soil conditioner. This fish fertilizer for vegetables will lead to healthier crop yields and general plant well being.
- EASY TO APPLY FOR NATURAL GREAT RESULTS: Apply liquid fish & kelp fertilizer to improve specific growth stages. For House Plants; use 1 tablespoon per gallon of water. Feed every two weeks and do not over water. For Outdoor Plants; Use 2 fl. Oz per gallon of water. Feed vegetables, flowers, trees and shrubs every 2-3 weeks. Apply until soil is saturated or as a foliar feed until leaves are wet, top and bottom. For Lawns; use 2 to 4 oz concentrate per gallon of water to cover 1,000 sq. ft.
- TRUSTED & RELIABLE: At GS Plant Foods, we understand that you are placing your trust in us to provide you with the highest quality products available. We have 100% confidence in the quality of our products and continuously strive to deliver the best customer experience. Our products are organic, easy to use, cost efficient, sustainable, and yield consistent & amazing results in your garden, no matter what you’re growing or what medium in which your plants are growing.
Indian River Organics Fish Plus Kelp Seaweed 128 oz. Concentrate
- ORGANIC FISH AND SEAWEED FERTILIZER: Now our all-natural high quality fish fertilizer is combined with North Atlantic kelp to produce a plant nutrient source that is beyond compare. Your plants get all the benefits of a natural liquid fish fertilizer PLUS all the additional benefits of seaweed in one easy to use liquid product. Plants receiving both fish and seaweed fertilizer out-perform in every category, they are much healthier and more resistant to heat, drought, and cold.
- FISH IS PACKED WITH AMINO ACIDS AND MICRO NUTRIENTS: Our liquid fish fertilizer is an industry leader and produces amazing results in fruits, vegetables, plants, and lawns. It provides much more than just N-P-K (Nitrogen, Phosphorus and Potassium) found in synthetic fertilizers. Our organic liquid fish fertilizer provides a comprehensive mix of amino acids & micro nutrients and minerals all in a usable form perfectly suited for maximum efficiency of uptake for your plants.
- SEAWEED IS AN AMAZING PLANT SUPPLEMENT: We add North Atlantic kelp that is pure and free of contaminants. It is manufactured using our proprietary digestion and refinement process that breaks down complex polysaccharides into smaller, lower molecular weight particles and novel compounds. These new compounds are not present in the original ascophyllum nodosum biomass and are now in a bio- available form and some have been modified making them water soluble allowing for immediate plant benefit.
- EASY TO APPLY FOR GREAT RESULTS: For Lawn: Mix 2 oz in 1 gallon of water, spray to cover 500 square feet. Fruits & Vegetables: Mix 4 oz in 1 gallon of water, spray to drench, including underside of leaves. Flowers & Plants: Mix 3 oz in 1 gallon of water, spray to drench, including underside of leaves. Citrus & Other Trees: Mix 4 oz in 1 gallon of water, spray to drench, including underside of leaves. Seedlings: Mix 4 oz in 1 gallon of water.
- TRUSTED & RELIABLE: At Indian River Organics, we understand that you are placing your trust in us to provide you with the highest quality products available. We have 100% confidence in the quality of our products and continuously strive to deliver the best customer experience possible. Our products are organic, easy to use, cost efficient, sustainable, and yield consistent & amazing results in your garden, no matter what you’re growing.
Age Old Fish and Seaweed Liquid Fertilizer, 1-Gallon
- Made with Premium Ascophyllum nodosum sea kelp and ocean fish
- Ideal for both soil and foliar applications
- Promotes growth of soil microorganisms with an excellent source of
- natural plant nutrients
- Safe, easy to use, and perfect for all indoor and outdoor plants
- All natural plant nutrient with a mild odor that encourages strong root
- growth and increased seed germination
Elm Dirt Fish Emulsion Fertilizer – High Energy Liquid Fertilizer for Plants 2-3-0 | Increase Biological Activity & Improve Nutrients, Vegetable Garden (32 oz)
- Introducing Elm Dirt Hi-Energy Fish: At the heart of our innovative Hi-Energy Fish product lies the essence of naturally fermented whole salmon, a distinctive offering unlike any other in the fish product spectrum. What sets it apart? The salmon’s vibrant pink flesh and rich fat content paved the way for a remarkable product enriched with over 70% volatile fatty acids.
- A Natural Boost for Immunity: Nature knows best, and so does Hi-Energy Fish. Our product acts as a catalyst, stimulating your plants’ innate immune response. By triggering this natural defense mechanism, you’re not just nurturing your crops; you’re fostering their resilience and vitality.
- The Hi-Energy Advantage: From robust root development to increased harvests and superior quality forages and pastures, your plants respond favorably to the inclusion of Hi-Energy Fish. Our product offers crops a unique blend of compounds that awaken their natural defense mechanisms and foster the growth of essential soil organisms, bolstering overall plant health and nutrient release.
- Optimal Application Rates: Achieving the best results with Elm Dirt Hi-Energy Fish requires a keen understanding of application rates. For acreages, a recommended dosage of 1-3 quarts (1-3 liters) per acre, combined with a 1:10+ dilution at planting, When nurturing transplants or using root drip application methods, a gentle 1:500 dilution is the key to nurturing healthy young plants. Foliar application is an effective way to ensure your crops receive the essential nutrients they crave.
- Our story: At Elm Dirt, we take pride in crafting exceptional organic fertilizers that prioritize both plant health and environmental responsibility. Our Plant fertilizers are carefully developed, keeping in mind the diverse needs of various plants. We are committed to sustainability and supporting local production. That’s why Elm Dirt Plant food is proudly made in the US, adhering to strict quality standards and eco-friendly practices.
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 key ingredients should I look for in a liquid fish and seaweed fertilizer?
The most important components are high-quality fish emulsion for nitrogen and amino acids, and pure kelp or seaweed for micronutrients and growth hormones. Look for products that mention cold-pressed or low-heat processing, as this preserves nutrients. Certifications like OMRI organic indicate the source is sustainably harvested.
How does the NPK ratio affect my garden’s performance?
A 2-3-1 ratio provides a balanced blend of nitrogen for leafy growth, phosphorus for root and flower development, and potassium for overall vigor. This ratio is ideal for regular, light feedings on vegetables, flowers, and indoor plants. Higher nitrogen formulas may boost foliage but can reduce bloom quality.
Which product offers the best value for large‑scale use?
The 128‑oz Indian River Organics Fish Plus Kelp concentrate provides a high volume at a lower per‑ounce cost, making it economical for lawns and commercial beds. Its strong concentration means you’ll dilute more water per application, stretching the bottle further. For home gardeners, a 1‑gallon Neptune’s Harvest or Age Old bottle may be more convenient.
Do I need to worry about the strong fish smell?
All genuine fish emulsion products will have a noticeable odor; it’s a sign of real fish content. Products like the 1‑gallon fish emulsion from the second listing proudly note the pungent aroma as a quality indicator. The smell dissipates quickly after dilution and application, especially when mixed with water.
Can I use these fertilizers for both soil and foliar feeding?
Yes, most liquid fish and seaweed blends are versatile enough for soil drenches and foliar sprays. Foliar applications deliver nutrients directly to leaf tissue for rapid uptake, while soil feeds improve root health and microbial activity. Follow the label’s dilution rates for each method to avoid burn.
How do organic certifications influence product choice?
Organic certifications such as OMRI confirm that the fertilizer meets strict standards for natural ingredients and no synthetic additives. Certified products like the GS Plant Foods fish & kelp blend are ideal for gardeners seeking environmentally friendly options. Non‑certified items may still be natural but lack third‑party verification.
What should I consider when comparing price versus nutrient concentration?
A lower price per ounce does not always mean better value if the product is less concentrated and requires more frequent applications. Compare the NPK ratio, the amount of fish and kelp per gallon, and the recommended dilution. Higher‑concentration formulas often save money in the long run despite a higher upfront cost.
Are there any special storage tips to keep these fertilizers effective?
Store liquid fertilizers in a cool, dark place to prevent nutrient degradation and microbial growth. Keep the container tightly sealed to maintain potency and reduce odor leakage. For large containers, occasional shaking helps keep the ingredients evenly mixed before each use.