10 Best Liquid Seaweed Fertiliser

10 Best liquid seaweed fertiliser - July 2025

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Last Updated: 13-07-2025

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Multi-Mite® 20 Ltr LIQUID SEAWEED - ORGANIC Concentrate Plant Fertiliser Tomato, Trees Lawn Veg and House Plants Root or Foliar Feed

Multi-Mite

9.8

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Multi-Mite 10 Ltr Liquid Seaweed – 100% Natural & Organic Concentrate Cold Pressed Plant Feed & Soil Fertiliser, Trees Lawn Veg & House Plants Root or Foliar Feeding

Multi-Mite

9.6

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Best value

Premium Seaweed Fertiliser 10L Rich Liquid Seaweed Extract full of Nutrients/minerals | Promotes Root/Foliar Growth for Fruits/Vegtables/Pasture/Trees | Indoor/Outdoor use | Plant food

Generic

9.5

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Multi-Mite 5 Ltr Liquid Seaweed -100% Natural & Organic Concentrate Cold Pressed Plant & Soil Fertiliser, Trees Lawn Veg & House Plants Root or Foliar Feeding

Multi-Mite

9.2

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Vitax Organic Liquid Seaweed - Concentrated 2 Litres - Makes 800 Litres. For healthy growth in plants

Vitax Ltd

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 - 1 Litre Makes up to 500L

envii

8.8

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10% Off

2 X Doff 1L Liquid Seaweed Concentrated Multi-Purpose Feed

Doff

8.6

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Maxicrop All Purpose Plant Growth Stimulant, 1L - Natural Seaweed Based Liquid Biostimulant - Multivitamin Boost for All Garden Plants - Strong Roots - Healthy Growth - Builds Resilient Crops

Maxicrop

8.4

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14% Off

doff CONCENTRATED LIQUID SEAWEED 1L, Green

Doff

8.2

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Doff Liquid Seaweed Concentrate – 1L Natural Fertiliser for Healthy Growth of Flowers, Fruit, Vegetables & Shrubs – Seaweed Plant Food – Encourages Root Development – Makes 300L Feed

Doff

8.1

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Multi-Mite® 20 Ltr LIQUID SEAWEED - ORGANIC Concentrate Plant Fertiliser Tomato, Trees Lawn Veg and House Plants Root or Foliar Feed

Multi-Mite 10 Ltr Liquid Seaweed – 100% Natural & Organic Concentrate Cold Pressed Plant Feed & Soil Fertiliser, Trees Lawn Veg & House Plants Root or Foliar Feeding

Premium Seaweed Fertiliser 10L Rich Liquid Seaweed Extract full of Nutrients/minerals | Promotes Root/Foliar Growth for Fruits/Vegtables/Pasture/Trees | Indoor/Outdoor use | Plant food

Multi-Mite 5 Ltr Liquid Seaweed -100% Natural & Organic Concentrate Cold Pressed Plant & Soil Fertiliser, Trees Lawn Veg & House Plants Root or Foliar Feeding

Vitax Organic Liquid Seaweed - Concentrated 2 Litres - Makes 800 Litres. For healthy growth in plants

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

2 X Doff 1L Liquid Seaweed Concentrated Multi-Purpose Feed

Maxicrop All Purpose Plant Growth Stimulant, 1L - Natural Seaweed Based Liquid Biostimulant - Multivitamin Boost for All Garden Plants - Strong Roots - Healthy Growth - Builds Resilient Crops

doff CONCENTRATED LIQUID SEAWEED 1L, Green

Doff Liquid Seaweed Concentrate – 1L Natural Fertiliser for Healthy Growth of Flowers, Fruit, Vegetables & Shrubs – Seaweed Plant Food – Encourages Root Development – Makes 300L Feed

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