Organic Liquid Fish Fertilizer - OMRI-Certified 5 Gallon

In this review the focus is on GS Plant Foods Organic Liquid Fish, a hydrolyzed, fish-based fertilizer sold in a 5 gallon container that aims to boost growth, rebuild soil, and increase yields. The bottom line: gardeners and small commercial growers who want a concentrated, OMRI-listed organic soil and foliar feed will appreciate this product for its broad nutrient profile and ease of application. The single biggest reason to buy is its combination of usable macro and micro nutrients plus peptides and proteins that support stronger root systems and improved plant color.

Key Features

• OMRI-listed hydrolyzed fish: Certified organic listing means it can be used in organic programs without synthetic additives that could harm soil biology.
• Broad nutrient profile: Contains more than N-P-K, supplying macro and micro nutrients, minerals, peptides and proteins to support balanced plant nutrition.
• Soil rebuilding action: Promotes healthy bacteria and improves soil structure and water penetration for better nutrient uptake over time.
• Versatile application: Suitable as a soil drench or foliar feed for lawns, vegetables, trees, shrubs, seedlings and transplants.
• Concentrated 5 gallon size: Economical for larger gardens or small commercial operations where repeated feeding is needed.

Who It's For

This product is aimed at organic gardeners, hobby farmers, and small commercial growers who prioritize natural inputs and want a liquid feed that supports both foliage and root development. It is especially useful for users who value a product that improves soil biology while delivering usable nutrients to a wide range of plants.

Those who should look elsewhere include gardeners who are extremely sensitive to odors or who need a dry granular fertilizer; several customers reported a strong fishy smell that some find off-putting. Also, if you only have a very small indoor plant collection and want single-use packaging, a 5 gallon container may be more than necessary.

Pros & Cons

Pros

• OMRI-listed and organic, so it fits certified organic growing programs.
• Provides a wide array of macro and micro nutrients and biological stimulants for healthier plants and roots.
• Versatile use as both foliar feed and soil conditioner across many plant types.
• Good value in a concentrated 5 gallon size for frequent feeding schedules.

Cons

• Has a noticeable fishy smell that some users find strong when handling or applying.
• Large 5 gallon container may be bulky for small-space gardeners or infrequent users.

Specifications

Product type	Hydrolyzed fish liquid fertilizer
Certification	OMRI listed (organic)
Volume	5 gallon
Primary uses	Soil drench, foliar feed, lawns, vegetables, trees, shrubs
Nutrient content	Macro and micro nutrients, minerals, peptides and proteins (beyond N-P-K)
Application rate (examples)	Lawns: 1 gal per 30-40 gal water covers 1/4 acre; Trees/shrubs: 4 oz per gal water
Safety notes	No chlorine or heavy metals indicated

Our Verdict

GS Plant Foods Organic Liquid Fish is a practical choice for growers seeking an OMRI-listed, hydrolyzed fish fertilizer that supports soil life and plant vigor. It offers strong value in a concentrated 5 gallon format and works well alongside other organic products; note the fishy odor and large container may not suit every household. Overall, it is a solid organic fertilizer for those wanting healthier roots and improved yields.

Frequently Asked Questions

How is this applied?
Use as a soil drench or foliar spray; suggested mixes include 1 gallon per 30-40 gallons water for lawn coverage and 4 oz per gallon for trees and shrubs.

Is it safe for edible gardens?
Yes, it is OMRI-listed and designed for organic gardening, making it suitable for vegetables and fruit when used as directed.

Will the smell be a problem?
The product has a noticeable fish odor that some users find strong during mixing and application, though most report the performance outweighs this limitation.