Comparison: Best Fish Emulsion Fertilizer (Updated | Nov 11th)

Look at the NPK ratio, concentration, odor level, and whether the product is OMRI listed for organic gardening. Also compare liquid versus powder forms, as they affect storage, shelf life, and application methods. Finally, check if the fertilizer is suitable for the specific plants you are growing, such as vegetables, fruits, or ornamental flowers.

The NPK ratio indicates the balance of nitrogen (leaf growth), phosphorus (root and flower development), and potassium (overall health). A higher nitrogen ratio like 5-1-1 promotes lush foliage, while a balanced 2-4-1 or 12-2-2 supports fruiting and root strength. Choose a ratio that matches your garden’s stage: leafy greens benefit from higher nitrogen, whereas fruiting plants thrive with more phosphorus.

Neptune’s Harvest Fish Fertilizer and the Alaska Fish Emulsion with wintergreen deodorizer are formulated to reduce the typical fishy smell. Both are marketed as low‑odor and safe for indoor environments. If odor is a top priority, avoid the standard liquid emulsion that lists a strong fish scent as a feature.

Liquid emulsions, like the 1‑gallon Alaska and Central Garden Brands products, are ready to dilute and apply, making them convenient for quick feeding schedules. Powder forms, such as the 12-2-2 powder, have a longer shelf life, lower shipping weight, and produce less odor, but require mixing with water before use. Choose liquid for ease of use and powder for bulk applications and reduced storage space.

An OMRI listing confirms the fertilizer meets organic standards for use in certified organic farms and gardens. The Alaska Fish Fertilizer (115 oz) and Neptune’s Harvest both carry OMRI certification, giving you confidence that the product complies with organic regulations. This can be especially important if you sell produce as organic or follow strict organic gardening practices.

Yes, concentration varies widely: the 5‑1‑1 concentrates recommend 1‑2 tbsp per gallon of water for general plants, while the 12‑2‑2 powder can make up to 100 gallons from just 1 lb of powder. Some products, like the 2‑4‑1 Neptune’s Harvest, suggest a more moderate feeding schedule to avoid over‑fertilizing. Always follow the label’s dilution instructions to prevent nutrient burn and ensure optimal growth.

When measuring cost per unit of nutrient, the 1‑gallon Alaska Fish Emulsion and the 32‑oz Fertilome 5‑1‑1 provide a good balance of price and volume. The powder option (12‑2‑2) can stretch further, covering up to 300 gallons from 3.3 lb, making it the most economical for large plots. Compare the listed price per ounce or gallon to decide which fits your budget and garden size.

Fish source influences the profile of amino acids, omega‑3 fatty acids, and trace minerals; salmon‑based emulsions often contain higher levels of these beneficial compounds. Products like Bloom City’s Wild Fish Fertilizer highlight salmon oil for added omega‑3 content, which can improve plant stress resistance. While all fish emulsions provide organic nutrients, premium sources may deliver slightly richer micronutrient blends.