10 Best Seaweed Fertilizers For Nutrient Rich Soil - May 2026

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Last Updated: 27-05-2026

envii SeaFeed Xtra – Organic Seaweed Fertiliser, Liquid Outdoor Plant Food Ideal for all Plants, Lawns, Gardens and House Plants, Rich in Additional Nutrients - 1 Litre Makes up to 500L

envii

9.8

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Organic Seaweed Fertiliser, Nutrient-Rich Plant Feed, Liquid Seaweed for Plants, Lawns & Vegetables UK-Made (1L)

Oceanic Organic Ltd

9.6

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Best Value

Organic Seaweed Fertiliser, Nutrient-Rich Plant Feed, Liquid Seaweed for Plants, Lawns & Vegetables UK-Made (5L)

Oceanic Organic Ltd

9.5

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The Shropshire Seaweed Company - Certified Organic Plant Food & Lawn Feed - Promotes Growth, Enhances Roots & Soil Health. Sustainably Sourced from Ireland Liquid Organic Seaweed Fertilizer 1L

Shropshire Seaweed

9.2

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Multi-Mite 500g Organic Seaweed Meal Fertiliser – Natural Plant Food & Soil Conditioner for Lawns, Gardens & Vegetables – Slow Release, Improves Soil Health & Root Growth

Multi-Mite

9.1

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envii SeaFeed Xtra – Organic Seaweed Fertiliser, Liquid Outdoor Plant Food Ideal for all Plants, Lawns, Gardens and House Plants, Rich in Additional Nutrients, 10L

envii

8.8

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Seaweed and Kelp Fertilizer for Plants - Organic Sea-K - Concentrated Extract Powder Nutrient Makes 700 Liters

Greenleaf Nutrients

8.6

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Multi-Mite 1KG Organic Seaweed Meal Fertiliser – Natural Plant Food & Soil Conditioner for Lawns, Gardens & Vegetables – Slow Release, Improves Soil Health & Root Growth (1KG)

Multi-Mite

8.4

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Vitax Organic Liquid Seaweed Fertilizer – All-Natural Concentrated Plant Nutrient for Flowers, Vegetables, Shrubs & Trees – Boosts Growth, Resilience & Yields (500ml)

TOP SAVER

8.2

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CaplinTec Seaweed Fertiliser Pellets – Organic Plant Foodd for Gardens, Pots & Beds, Fast-Acting, Easy to Use Lawn Fertilizer, Nutrient-Rich & Sustainable Feed, 500 Grams

CaplinTec

8.1

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