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Ocean Liquid Fertilizers

10 Best Ocean Liquid Fertilizers 2025 in the United States

Name: MARPHYL Organic Liquid Fertilizer - Outdoor & Indoor Plant Food - All-Purpose, Nutrient-Rich Lawn Fertilizer & Soil Enhancer for House Plants, Flowers, Vegetables, Succulents, Bamboo, Hydroponics
Brand: MARPHYL
Price: 14.98 USD
Availability: InStock

From leading brands and best sellers available on the web.

GS Plant Foods Seaweed Fertilizer - Omri Organic Liquid Kelp Seaweed Fertilizer (275 Gallon) - Liquid Kelp & Seaweed Concentrate for Farms, Gardens, Greenhouses, Lawns & Soil

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Winner

MARPHYL

MARPHYL Organic Liquid Fertilizer - Outdoor & Indoor Plant Food - All-Purpose, Nutrient-Rich Lawn Fertilizer & Soil Enhancer for House Plants, Flowers, Vegetables, Succulents, Bamboo, Hydroponics

9.8

score

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GS Plant Foods Seaweed Fertilizer - Omri Organic Liquid Kelp Seaweed Fertilizer (275 Gallon) - Liquid Kelp & Seaweed Concentrate for Farms, Gardens, Greenhouses, Lawns & Soil

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True Organic

True Organic All Purpose Liquid Plant Food - Liquid Fertilizer 16oz - CDFA, OMRI Listed for Organic Gardening NPK 3-2-2

9.6

score

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Liqui-Dirt

Natural Plant Food Fertilizer All-Purpose NPK Plant Care. 18 Balanced & Blended Vitamins & Minerals with Micro-Fungi and Bio-Organisms to boost your plants growth by Liqui-Dirt. Yields 50 Gallons

9.4

score

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GARDENWISE

GARDENWISE 10-10-10 Fertilizer for All Purpose Plants - Liquid Fertilizer with Seaweed Kelp & Iron - Plant Food Outdoor & Indoor Plant Food, Vegetables,Flowers, Lawn & Garden 10 10 10 Fertilizer 16 oz

9.2

score

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Bloom City

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

8.9

score

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Neptune's Harvest

Neptune's Harvest Fish Fertilizer 2-4-1, 36 Ounce

8.7

score

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GS Plant Foods

Editor’s Choice

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

8.4

score

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The Grow Co

Organic Fish Fertilizer - Liquid Fish Emulsion Food for Plants, Flowers, Fruits & Vegetables - 2-3-1 NPK - Made from Sustainably Sourced Hydrolyzed Fish (1 Gallon)

8.2

score

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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

7.9

score

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#10

Ocean

OceanSolution 2-0-3 - Plant Food - Liquid Organic Fertilizer for Gardens, Landscapes, Hydroponics (Organic Ocean Mineral Fertilizer Concentrate 1 Gallon Jug)

7.6

score

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More products we considered

Humboldts Secret Set of A & B Liquid Hydroponics Fertilizer - World's Best Nutrient System – Hydroponic Nutrients for Outdoor, Indoor Plants – Supports Vegetative and Flowering Stages of Plants

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Arber Nutrition & Health Starter Set - Organic Plant Nourishment, Protection & Growth Boost - Liquid Concentrate for Gardens (Organic Nutrition & Health Set)

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𝐏𝐑𝐎𝐅𝐄𝐒𝐒𝐈𝐎𝐍𝐀𝐋 All-Purpose 20-20-20 Liquid Fertilizer Spray for Lawns, Grass, Plants, Vegetables, Fruits & Flowers | 20-20-20 Liquid Fertilizer for Indoor and Outdoor Plants (32 OZ)

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Humboldts Secret pH Down | Liquid pH Plant Balancer for Soil & Hydroponics Growing System (8 Ounce)

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Humboldts Secret Calcium, Magnesium and Iron Supplement – Hydroponic Supplies – Liquid Nutrient Fertilizer – Supports Vegetative and Flowering Stage – 8 Ounce

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10 Best Ocean Liquid Fertilizers 2025 in the United States

GS Plant Foods Seaweed Fertilizer - Omri Organic Liquid Kelp Seaweed Fertilizer (275 Gallon) - Liquid Kelp & Seaweed Concentrate for Farms, Gardens, Greenhouses, Lawns & Soil

MARPHYL Organic Liquid Fertilizer - Outdoor & Indoor Plant Food - All-Purpose, Nutrient-Rich Lawn Fertilizer & Soil Enhancer for House Plants, Flowers, Vegetables, Succulents, Bamboo, Hydroponics

GS Plant Foods Seaweed Fertilizer - Omri Organic Liquid Kelp Seaweed Fertilizer (275 Gallon) - Liquid Kelp & Seaweed Concentrate for Farms, Gardens, Greenhouses, Lawns & Soil

True Organic All Purpose Liquid Plant Food - Liquid Fertilizer 16oz - CDFA, OMRI Listed for Organic Gardening NPK 3-2-2

Natural Plant Food Fertilizer All-Purpose NPK Plant Care. 18 Balanced & Blended Vitamins & Minerals with Micro-Fungi and Bio-Organisms to boost your plants growth by Liqui-Dirt. Yields 50 Gallons

GARDENWISE 10-10-10 Fertilizer for All Purpose Plants - Liquid Fertilizer with Seaweed Kelp & Iron - Plant Food Outdoor & Indoor Plant Food, Vegetables,Flowers, Lawn & Garden 10 10 10 Fertilizer 16 oz

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

100 EarthPods - Premium Bio Organic Citrus Fertilizer Spikes - Special Plant Food Formulated for Citrus Fruit Trees - Made in USA

𝐁𝐄𝐒𝐓𝐒𝐄𝐋𝐋𝐄𝐑 Plant Superfood for PHILODENDRON Plants with B1 Vitamin, Glucose and Essential Minerals - Organic Plant Food Fertilizer for Indoor & Outdoor PHILODENDRON Plant Care - 8oz

Humic Acid - Organic Liquid Humic Concentrate with Fulvic Acid - (5 Gallon Drum) - Multi-Purpose Soil Conditioner - Suitable for Gardens, Lawns, Houseplants & Trees

Omri Listed Fish & Kelp Fertilizer for Plants

Humboldts Secret Sweet & Sticky – Carbohydrate and Saccharide Energy Source – Enhance Aroma and Flavor of Plants – Potting Soil for Indoor Plants – Energy for Plants – 8 Ounce

Neptune's Harvest Fish Fertilizer 2-4-1, 36 Ounce

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

Organic Fish Fertilizer - Liquid Fish Emulsion Food for Plants, Flowers, Fruits & Vegetables - 2-3-1 NPK - Made from Sustainably Sourced Hydrolyzed Fish (1 Gallon)

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

OceanSolution 2-0-3 - Plant Food - Liquid Organic Fertilizer for Gardens, Landscapes, Hydroponics (Organic Ocean Mineral Fertilizer Concentrate 1 Gallon Jug)

Organic Liquid Fertilizers

Liquid Lawn Fertilizers

Liquid Fertilizers

Tide Liquid Fertilizers

Humboldts Secret Set of A & B Liquid Hydroponics Fertilizer - World's Best Nutrient System – Hydroponic Nutrients for Outdoor, Indoor Plants – Supports Vegetative and Flowering Stages of Plants

Arber Nutrition & Health Starter Set - Organic Plant Nourishment, Protection & Growth Boost - Liquid Concentrate for Gardens (Organic Nutrition & Health Set)

𝐏𝐑𝐎𝐅𝐄𝐒𝐒𝐈𝐎𝐍𝐀𝐋 All-Purpose 20-20-20 Liquid Fertilizer Spray for Lawns, Grass, Plants, Vegetables, Fruits & Flowers | 20-20-20 Liquid Fertilizer for Indoor and Outdoor Plants (32 OZ)

Humboldts Secret pH Down | Liquid pH Plant Balancer for Soil & Hydroponics Growing System (8 Ounce)

Humboldts Secret Calcium, Magnesium and Iron Supplement – Hydroponic Supplies – Liquid Nutrient Fertilizer – Supports Vegetative and Flowering Stage – 8 Ounce