Available now
1 litre · Approved for use in organic systems
Organic seaweed fertiliser
OF&G approved for use in organic systems. Use 10ml in a 5 litre watering can; one bottle makes 500 litres of feed.
Free UK delivery
Organic seaweed fertiliser
Healthier
plants,
naturally.
An OF&G-approved seaweed feed for use in organic systems, suitable for flowers, fruit, vegetables, lawns and houseplants. One bottle makes 500 litres.
£14.99 · Free UK delivery
Shop
For the whole
garden.
Seaweed fertiliser approved for use in organic systems, our hose sprayer for larger areas, and organic seaweed meal coming soon.
Hose attachment · Available now
Hose sprayer
Attach it to a garden hose to apply liquid feed across lawns, beds and borders while you water.
See how it works →Coming soon
700g · Coming soon
Organic seaweed meal
700g seaweed meal made from Ascophyllum nodosum, for mixing into beds, borders and compost.
£14.99
Save 10%
Best value · Two-piece set
Organic Seaweed & Sprayer Combined
Everything you need to feed pots, beds, borders and lawns.
- 1 litre organic seaweed biofertiliser
- Hose sprayer attachment
- Free UK delivery
£31.50£34.98Bundle saving
Why seaweed?
Help plants get more from the soil.
Seaweed helps plants make the most of water and nutrients. Used regularly, it supports stronger roots, healthy leaves, more flowers and crops that keep growing through changeable weather.
Roots grow stronger
Helping plants settle in and take up what they need.
Water goes further
Helping the soil hold moisture during dry spells.
More flowers and fruit
Supporting steady growth through the season.
Plants bounce back
Giving them extra support after heat, wind and everyday stress.
About us
From the Atlantic shore.
We are a family-run business. Our family has harvested seaweed on the west coast of Ireland for generations. Atlantic Organic carries that knowledge forward—carefully gathering a remarkable natural resource and bringing it from the Atlantic shore to gardens across the UK.
A long tradition
Harvested by
the Atlantic.
Seaweed has been gathered from Ireland’s Atlantic shore for generations. It is still cut by hand, with care and respect for this renewable natural resource.
Ascophyllumnodosum
How it helps
Healthier plants,
from the roots up.
Seaweed helps soil hold water and nutrients, supports root development and gives plants extra help through heat, dry spells and everyday stress.
That means healthy foliage, resilient flowers, productive fruit and vegetables, and greener lawns.
01Better soilSupports moisture and nutrient retention
02Stronger rootsHelps plants establish and feed
03Healthier growthFor vigorous, resilient plants
Our standards
Approved, carefully harvested and simply made.
OF&G approved for use in organic systems
Organic Farmers & Growers has approved the product for use in organic systems.
Sustainably harvested
We use naturally renewable Ascophyllum nodosum from Ireland’s Atlantic coast, harvested with care so the living seaweed can regenerate.
Cold pressed
A straightforward process without harsh chemical extraction or high heat.
Recyclable bottle
Our 1 litre HDPE bottle can be rinsed, capped and placed in household recycling.
How to use it
Measure, mix
and water.
Shake the bottle, add 10ml to a full 5 litre watering can and water your plants as usual.
Shake
Shake the bottle to activate the biostimulants.
Measure
Fill the cap with 10ml of fertiliser.
Mix
Pour into a full 5 litre watering can.
Feed
Water your plants as usual.
06 / Good to know
Your questions,
answered.
What is it made from?+
Cold-pressed Ascophyllum nodosum — North Atlantic knotted wrack — with no chemical additives.
Which plants can I use it on?+
Fruit, vegetables, flowers, lawns, houseplants and containers. It is an all-purpose feed for the whole garden.
How much do I use?+
Measure 10ml into a full 5 litre watering can. One 1 litre bottle makes 500 litres of diluted feed.
How often should I use it?+
Feed regularly through the active growing season, either around the roots or as a foliar spray.
How does delivery work?+
UK delivery is free. Orders are dispatched within 3–5 working days.
Can I return an order?+
Yes. Contact us within 14 days of delivery if you change your mind. Full details are available in our Returns & Refunds policy linked below.
Contact us
Questions about the product or your order?
We’re a family-run business and are happy to help.
Available at
Find Atlantic Organic in all Longacres Garden Centres.