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Organic Seaweed Liquid Fertilizer 20L



Emerald Isle Seaweed Organic Seaweed Liquid Fertilizer 20 Litres.

20  litre container

Organic kelp liquid fertilizer for plants, lawns, golf courses and crops.

Organic kelp liquid fertilizer is a completely natural, organic product and has a source of over 70 vitamins and minerals (nothing else added).

Certified Organic by the Irish Organic Farmers and Growers Association.

Organic kelp fertilizer can be applied to any type of soil or plant without concern for waste by-products or harmful chemicals, leading to healthier crop yields and general plant well being. Kelp seaweed was traditionally used as a fertilizer and spread on these lands from the 18th century.

All seaweed has be harvested in the Causeway Coast of Ireland.

    • Produces a higher yield of crop

    • Plant growth stimulant.

    • Encourages germination of seeds and root growth

    • Repels slugs and other pests.

    • Enriches the soil.

    • Contains natural growth hormones.

    • Boosts lethargic plants.

    • Helps lighten the soil.

    • Applied to pasture crops increases the nutrient uptake, the protein content, and overall quality of the crop.

  • At Emerald Isle Seaweeds we only use a cold extraction process . Other seaweed fertilisers on the market use chemicals to extract the seaweed liquid, this can adversely affect and alter the natural composition of the seaweed and reduce its nutritional goodness.

Because of soil depletion from unsustainable farming practices, most whole foods are lacking in sufficient mineral levels necessary for human health.

Kelp seaweed liquid content helps to bind soil crumbs together.

Kelp fertilizer contains all soil nutrients plus a full range of trace elements and amino acids.



20 ml per 5 L of water

Lawns: general use 2L will do an acre every 3-4 weeks For recovery 6-8 L every 2-3 weeks.1-2 ml per square meter.

Best used as a foliar spray on the plants leaves and lawns.

  • Vegetables: every fortnight 10ml-5L.Soft fruits: 25ml – 5L once a week.Apples pears 30ml- 5L once a week.

    Vegetables: 10ml – 5L once a fortnight.

    Flower beds 10ml – 5L once a week.

    Lawns 1:50 every two weeks (for two months).

    Germination of seeds and root growth: soak in the seaweed for 10-12 hours 5ml-5L.

    Grass 1ml per Square Meter or 2ml if lawn is in recovery / 5ml per Litre every 25 days

    Hedges 15ml per 5ml once a week

    Help extend the shelf life of fruits and vegetables spray eight days before harvesting.

For golf courses and lawns use 5 Litres per acre every 4 weeks diluted with water during  summer months.

Foliar application is no doubt the most efficient and effective method of administering liquid seaweed to your plants or lawns . Kelp liquid seaweed is 8 to 20 times more effective when applied to the leaves than when applied on the soil. Spray as a fine mist until it drips off the plants’ surfaces and the plants will immediately absorb the fertilizer and begin to benefit from it by the second day

Help extend the shelf life of fruits and vegetables spray eight days before harvesting.

Nutritional Values for 100g of product.

Energy values, KCal/KJ per 100g, 166/686 . Protein 13.7  . Fatg/100g, 0.2  . Saturated Fat g/100g 0.2 Mono-unsaturated Fat 0.1.  . Poly-unsaturated fat < 0.1  . Available carbohydrate, g/100g 8.7   . Total Sugars g/100g 3.6 . Dietary Fibre AOAC, g/100g 36.8 . Sodium, mg/100g 4899 . Moisture g/100g 11.6  . Ash g/100g 28.9

Our seaweed has undergone a full range of thorough tests which include chemical, pesticides, water content, and nutrition.

All Seaweed tests have be done in laboratory conditions and is UKAS accredited. HACCP control system in place.

more information on seaweed liquid please see research on the link below.

Acknowledgement  (Kavipriya Ramuand Thangaraju Nallamuthu Prof. D r. R. Rengasamy)

  Before                      After

Feedback 2023 from amazon customers!


Reviewed in the United Kingdom on 15 June 2023

I am an amateur gardener in retirment from running ships’ enginerooms. I have five fruit trees in very large containers (155 Litre) and I have seven hydrangeas also in large containers (76 litre). Discovering this kelp fertiliser years ago was a seminal moment that I look back on with great satisfaction. It is such a great product and it comes from an old-world family business. Long may it continue. The fact that it is an organic product being an extract of seaweed that may be applied as a foliar spray ‘ a little and often’ each week is just WONDERBAR. I love using it.



Noemi Marlow

Reviewed in the United Kingdom on 18 May 2023

This 100% organic product works very well: my laurel tree and other plants love it! I’m also pleased to buy it from a small family business who take very good care of their customers. They are based in Northern Ireland but I didn’t have any problem at all with the delivery, which was fast and on time. Very happy to recommend this to all amateur gardeners.

Additional information

Weight 3 kg