Comparison: Best Fish Emulsion Use (Updated | Dec 1st)

Look at the N‑P‑K ratio, concentration (liquid vs. powder), and any organic certifications such as OMRI. Check the product’s odor level if you prefer a low‑smell option, and verify the recommended application rates for your plant types. Also compare package sizes to assess cost per ounce or per gallon.

Liquid concentrates like the 5‑1‑1 formulas are ready to dilute and apply, offering quick absorption but often have a stronger fishy smell. Powdered options, such as the 12‑2‑2 powder, are dry, less odorous, and can be mixed into large volumes of water for extensive garden use. The powder typically provides a higher nutrient density per weight, which can be more economical for big plots.

OMRI certification guarantees the product meets organic standards, which is important for certified organic gardens and for consumers avoiding synthetic inputs. While OMRI‑listed products like Safergro Aqua Power may cost slightly more, they also often contain added amino acids, vitamins, and minerals that boost plant health. If organic compliance is a priority, the certification adds clear value.

Formulations that emphasize a gentle 5‑1‑1 ratio and label themselves as “non‑burning,” such as Liquinox 7128 and Harris Organic, are designed to be safe for young plants. Using the recommended dilution (usually 1‑2 tbsp per gallon for foliage) further reduces burn risk. Always start with a weaker solution and increase if plants respond well.

Traditional liquid fish emulsions have a strong fishy smell, which can be off‑putting for indoor gardening. Products that are deodorized, like Alaska Fish Emulsion with natural wintergreen, or dry powders such as the 12‑2‑2 fish protein, minimize this issue. If you plan to use the fertilizer near living spaces, opting for a low‑odor or powder form can improve comfort.

When comparing cost efficiency, larger containers like the 1‑gallon concentrates (e.g., Alaska Fish Emulsion or Fertilome 1 gal) typically offer a lower price per ounce than the 8‑oz bottles. The 12‑2‑2 powder, which makes up to 100 gallons from a 1‑lb bag, provides the highest nutrient density and can be the most economical for extensive gardens. Calculate the total nutrient content you receive per dollar to determine true value.

Yes, many fish emulsions are versatile; the Fertilome 5‑1‑1 recommends 1‑2 tbsp per gallon for houseplants and 4 tbsp per gallon for trees. However, outdoor trees may benefit from a stronger dilution due to larger root zones, while indoor plants require a gentler mix to avoid over‑feeding. Always follow the specific dosage guidelines on the label for each plant category.

Several products list additional micronutrients such as iron, manganese, zinc, and a suite of amino acids (e.g., Safergro Aqua Power and Liquinox 7128). These trace elements support enzyme function, chlorophyll production, and overall plant vigor, especially in soils that are deficient. Choosing a formula with a broad micronutrient profile can enhance growth beyond what nitrogen, phosphorus, and potassium alone deliver.