10 Best kelp supplement for plants in the US

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Last Updated - April 28, 2024

Best Choice

1

Blue Planet Nutrients

Liquid Seaweed for Plants (128 oz) Gallon | Concentrated Liquid Kelp Supplement | Makes UP to 1,890 GALLONS | for All Plants & Gardens | Blue Planet Nutrients
9.8

Exceptional

Our Rating

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

9.7
worth the money

9.7
Simple to use

9.3
Aroma
- Amazon
More info

Why we love it

Organic: derived from organic seaweed.

Versatile: benefits all plant varieties.

Adaptable: works in all garden types.
Value for Money

2

GS Plant Foods

Organic Kelp Fertilizer by GS Plant Foods - Omri Listed(1 Gallon) - Liquid Kelp Concentrate for Gardens, Lawns & Soil Yields 800+ gallons
9.7

Exceptional

Our Rating

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

9.7
Simple to use

9.3
worth the money

8.0
Aroma
- Amazon
- Walmart
More info

Why we love it

OMRI listed organic fertilizer

Natures miracle plant food

Increases crop yields plant health
3

Bloom City

Organic Liquid Seaweed and Kelp Fertilizer Supplement by Bloom City, Quart (32 oz) Concentrated Makes 180 Gallons
9.6

Exceptional

Our Rating

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

9.5
Simple to use

9.3
worth the money
- Amazon
More info

Why we love it

Fully organic seaweed kelp

Extracted to protect enzymes

Simple safe to use for all plants
4

Blue Planet Nutrients

Liquid Seaweed for Plants (32 oz) Quart | Concentrated Liquid Kelp Supplement | Makes UP to 470 GALLONS | for All Plants & Gardens | Blue Planet Nutrients
9.5

Excellent

Our Rating

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

9.7
Simple to use

9.5
worth the money

8.7
Aroma
- Amazon
- Walmart
More info

Why we love it

Organic material: Contains natural carbs, micro nutrients, organic matter.

Versatile: For all plants, soil, hydroponic, coco coir, more.

Powerful: Enhances plant vitality success in the garden.
5

Down To Earth All Natural Fertilizers

Down to Earth Kelp Meal 1-0.1-2, 5lbs
9.4

Excellent

Our Rating

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

9.7
Simple to use

9.5
worth the money

9.1
Aroma
- Amazon
- Walmart
6

Oceangreen Organics

Oceangreen Organics Seaweed Kelp Supplements New Zealand | Premium - 100% Pure Organic & Natural - Multi-Nutrient & Thyroid Support Supplement - Natural Source of Iodine | 60 Vegetarian Capsules
9.2

Excellent

Our Rating

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
- Amazon
7

Blue Planet Nutrients

Easy Weed Soluble Seaweed (3.5 oz) Soluble Kelp Supplement | for All Plants & Gardens | Makes UP to 385 GALLONS | Blue Planet Nutrients
8.9

Very Good

Our Rating

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
- Amazon
8

Greenleaf Nutrients

Organic Sea-K for Plants Seaweed and Kelp Fertilizer Supplement Concentrated Extract Powder Nutrient
8.6

Very Good

Our Rating

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
- Amazon
More info

Why we love it

Seaweed extract is a natural, potent way to improve your plants.

It can help increase resistance to stress, promote fruit and flower expansion, and improve coloring and potency.

Seaweed extract is also rich in vitamins, minerals, and enzymes that can benefit your plants and revitalize your soil media.
9

GS Plant Foods

GS PLANT FOODS Kelp & Yucca Wetting Agents for Soil & Plants (1 Quart) – Economic Soil Improver & Plant Fertilizer – Organic Kelp Seaweed Fertilizer Combined with Yucca – Quart 32oz
8.5

Good

Our Rating

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
- Amazon
10

Fox Farm

Fox Farm Bushdoctor Kelp Me Kelp You Fertilizer, 1 Quart

15% Off
8.4

Good

Our Rating

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
- Amazon
- Walmart

10 Best kelp supplement for plants in the US

1

Liquid Seaweed for Plants (128 oz) Gallon | Concentrated Liquid Kelp Supplement | Makes UP to 1,890 GALLONS | for All Plants & Gardens | Blue Planet Nutrients

9.7

9.7

9.3

Why we love it

2

Organic Kelp Fertilizer by GS Plant Foods - Omri Listed(1 Gallon) - Liquid Kelp Concentrate for Gardens, Lawns & Soil Yields 800+ gallons

9.7

9.3

8.0

Why we love it

3

Organic Liquid Seaweed and Kelp Fertilizer Supplement by Bloom City, Quart (32 oz) Concentrated Makes 180 Gallons

9.5

9.3

Why we love it

4

Liquid Seaweed for Plants (32 oz) Quart | Concentrated Liquid Kelp Supplement | Makes UP to 470 GALLONS | for All Plants & Gardens | Blue Planet Nutrients

9.7

9.5

8.7

Why we love it

5

Down to Earth Kelp Meal 1-0.1-2, 5lbs

9.7

9.5

9.1

6

Oceangreen Organics Seaweed Kelp Supplements New Zealand | Premium - 100% Pure Organic & Natural - Multi-Nutrient & Thyroid Support Supplement - Natural Source of Iodine | 60 Vegetarian Capsules

7

Easy Weed Soluble Seaweed (3.5 oz) Soluble Kelp Supplement | for All Plants & Gardens | Makes UP to 385 GALLONS | Blue Planet Nutrients

8

Organic Sea-K for Plants Seaweed and Kelp Fertilizer Supplement Concentrated Extract Powder Nutrient

Why we love it

9

GS PLANT FOODS Kelp & Yucca Wetting Agents for Soil & Plants (1 Quart) – Economic Soil Improver & Plant Fertilizer – Organic Kelp Seaweed Fertilizer Combined with Yucca – Quart 32oz

10

Fox Farm Bushdoctor Kelp Me Kelp You Fertilizer, 1 Quart

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