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Oceanic Organic

Organic Seaweed Fertiliser

Organic Seaweed Fertiliser

£12.99
£12.99
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✅100% Organic & OF&G Certified ✅Pet & Child Safe ✅Fast Results in 7–10 Days ✅Free UK Shipping on Orders Over £20 ✅Made in Britain

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💰 FOR A LIMITED TIME SAVE 10% USING CODE 'GROW10'

Boost plant growth, strengthen roots, and improve soil health with our cold-processed organic seaweed fertiliser. Safe for pets, kids, and edible crops — perfect for everything from lawns to allotments. Seaweed fertiliser for plants supports healthier root development, improved nutrient uptake, and stronger overall growth. Regular use helps plants recover from stress, enhances leaf colour, and promotes long-term soil vitality without synthetic chemicals. 


🌊 8% Seaweed Concentrate – One of the most potent formulas on the market
🧪 High Strength = Better Results – More active compounds per dose
🌱 Cold-Processed Ascophyllum Nodosum – Preserves natural growth stimulants
💧 Ultra-Efficient Dilution – 1L makes 100L of feed (10ml per litre)
📈 Delivers Visible Growth in Days – Boosts strength, colour & vitality
🧒🐾 Safe for Pets, Kids & Edible Plants – 100% Organic & Non-Toxic
🇬🇧 Made in Britain – Trusted by farmers, now available to home growers
✅ Certified Organic by OF&G – Grown with confidence View full details
🌿 100% Organic 🇬🇧 Made in the UK 📦 Free UK Shipping On Orders Over £20 ✅ OF&G Certified 🧪 Cold-Processed Formula 🐾 Pet & Child Safe 🌿 100% Organic 🇬🇧 Made in the UK 📦 Free UK Shipping ✅ OF&G Certified 🧪 Cold-Processed Formula 🐾 Pet & Child Safe

  • What Is Seaweed for Fertiliser? 

    Oceanic Organic Seaweed Fertiliser is a cold-processed liquid extract made from sustainably harvested seaweed. Our unique low-temperature method preserves the natural compounds that stimulate plant growth, improve soil health, and build long-term resilience — all without synthetic chemicals.

  • Why Does It Work?

    • Packed with essential nutrients, minerals, and trace elements
    • Includes natural bio-stimulants that support vigorous plant growth
    • Enhances root development and nutrient uptake
    • Boosts plant resilience to stress, pests, and disease
    • Helps restore soil structure and microbial health over time

  • How to Use

    Dilution: Mix 1 capful (approx. 20ml) per 2 litres of water.
    Application: Water the soil or spray directly onto leaves.
    Frequency: Every 10–14 days during the growing season.
    Shake well before use. Suitable for watering cans, spray bottles, or irrigation systems.

  • What to Expect

    • Faster, stronger plant growth
      Improved flowering, fruiting, and overall yield
    • Healthier roots and better soil structure
      Recovery from drought, waterlogging, or poor conditions
    • A visible improvement in plant colour, strength, and vitality within 7–14 days

  • Safe For

    • Edible vegetables and fruit crops
      Flowers, lawns, shrubs, and potted plants
    • Use in greenhouses, polytunnels, raised beds, and containers
    • Safe for pets and children once applied and absorbed

  • Made in the UK with Certified Organic Seaweed

    Proudly made in the UK using seaweed harvested from clean waters. Certified 100% organic by Organic Farmers & Growers (OF&G) and approved for sustainable use in all types of gardens and growing environments.

Real Results from Real Growers, with 180+ 5* Reviews on eBay!

  • 5-stars_e13fe2eb

    "This company went above and beyond to sort out a problem with delivery, they answered me quickly and followed up to ensure I'd received the goods. I will definitely use them again."

  • 5-stars_e13fe2eb

    "Shaken up well and ready to mix, this looks like some of the good stuff, not thin and watery like some of the stuff sold on here. Genuinely certified as 100% organic (check the OF&G web site listings) and as such very reasonably priced. Time will tell soon enough but super fast shipping from the seller and an equally fast response to comms. All looking good so far - many thanks"

  • 5-stars_e13fe2eb

    "Excellent product that really works at bargain price. Very helpful communication,highly recommended. Huge 'Thank you"

  • 5-stars_e13fe2eb

    "Brilliant highly recommend this product, ordered 5lts it came in two 2.5lt which made it so much easier 4 me 2 lift, thank you. So easy 2 use, makes all the difference 2 your flowers, fruit, veg."
See all of our verified reviews on eBay

Get in touch if you have anymore questions about our product

Frequently Asked Questions

What is organic seaweed fertiliser and how does it work? 

It is a cold-processed liquid extract made from sustainably harvested seaweed. Oceanic Organic’s formula preserves natural growth stimulants that improve root development, soil health, and overall plant vitality - without synthetic chemicals.

Why is seaweed for fertiliser effective for gardens and allotments?

Seaweed contains natural bio-stimulants, trace minerals, and nutrients that support stronger growth and better nutrient uptake. Regular use helps plants become more resilient to stress, pests, and poor soil conditions over time.

How do I use liquid seaweed fertiliser for best results? 

Dilute one capful (around 20ml) per 2 litres of water. Apply directly to the soil or spray onto leaves every 10–14 days during the growing season. It’s suitable for watering cans, sprayers, and irrigation systems.

Is this seaweed fertiliser safe for pets, children, and edible crops? 

Yes. Once diluted and applied, the product is non-toxic and safe for use around pets and children. It can be confidently used on vegetables, fruit plants, herbs, and other edible crops.

Can sea weed fertiliser be used on lawns and grass? 

Absolutely. This formula works well as a seaweed fertiliser for lawns, helping to strengthen roots, improve colour, and support recovery from drought, heavy use, or poor soil conditions.

What types of plants benefit from seaweed fertiliser for plants? 

This product is suitable for flowers, shrubs, houseplants, potted plants, vegetables, fruit trees, lawns, and greenhouse crops. Its gentle but effective formulation supports growth across all stages of a plant’s life cycle.

What are the main seaweed fertiliser benefits I can expect? 

Users typically see stronger growth, healthier roots, improved flowering and yields, and better soil structure. Many growers notice visible improvements in colour, strength, and vitality within 7–14 days of application.