Liquid Kelp Fertilizer 55 Gallon Drum - OMRI Listed Seaweed

In this review of GS Plant Foods Liquid Kelp Fertilizer 55 Gallon Drum the bottom line is clear: this concentrated seaweed extract is best for gardeners, landscapers, and small farmers who need an organic, root-focused tonic to boost plant vigor. The reviewer found it especially effective at improving root development and rapid green-up when used at recommended rates, making it a practical choice for soil health and recovery work. It is OMRI listed and suitable for organic growing, so anyone farming to organic standards will appreciate the compliance and natural origin.

Key Features

• OMRI Listed: Meets National Organic Program requirements so it can be used in certified organic production.
• Natural Seaweed Extract: Derived from Ascophyllum nodosum, it supplies trace micro and macro nutrients that support chlorophyll production and nutrient uptake.
• Feeds from the Roots Up: Encourages stronger root systems which improves soil structure and long-term plant resilience.
• Stress Support: Helps plants tolerate heat, drought, and poor soil conditions, keeping foliage greener under stress.
• Boosts Flowering & Growth: Regular use can improve bloom quality and overall plant productivity in vegetables, flowers, lawns, and shrubs.

Who It's For

This product is aimed at gardeners managing larger beds, landscapers, and small to mid-size growers who need a bulk supply and prefer certified organic inputs; the 55 gallon size suits continuous use or frequent applications. It is also a good option for soil remediation projects where improving root mass and microbial activity is a priority.

It is less appropriate for casual indoor houseplant owners or those who need a small, ready-to-use bottle; the 55 gallon drum requires transfer, storage and dilution equipment and is best handled by users prepared to measure and mix concentrated inputs.

Pros & Cons

Pros

• OMRI listing provides assurance for organic growers and certification compliance.
• Contains Ascophyllum nodosum extract to supply a broad spectrum of trace nutrients and promote root growth.
• Observably improves plant vigor and green-up when applied at recommended rates, with reported rapid growth and recovery.
• Good value per volume for frequent users, landscapers, and farms compared with small-pack concentrates.

Cons

• Strong marine odor reported by multiple users, which can be unpleasant during mixing and application.
• The 55 gallon format requires proper handling and storage, making it impractical for very small-scale or casual users.

Specifications

Product	Liquid kelp fertilizer
Volume	55 gallons
Active Source	Ascophyllum nodosum seaweed extract
Certification	OMRI Listed / Suitable for organic growing
Intended Use	Lawns, gardens, soil, vegetables, flowers, shrubs
Application Focus	Root development, chlorophyll production, stress support

Our Verdict

For gardeners and growers who regularly apply biological inputs and need an OMRI listed bulk seaweed concentrate, this 55 gallon kelp fertilizer is a practical, cost-effective choice that improves root strength and plant resilience. Buyers should be prepared for handling a large drum and an intense seaweed smell during mixing, but the benefits to growth and soil health make it good value for serious users.

Frequently Asked Questions

Is this product accepted in organic farming?
Yes, it is OMRI listed and meets National Organic Program requirements for use in organic production.

What does it primarily help with?
It primarily supports root development, nutrient uptake, chlorophyll production and plant stress tolerance.

Is the 55 gallon size suitable for small gardens?
It is best for regular users, landscapers or farms; small garden owners may prefer a smaller container due to handling and storage needs.