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  • The best liquid seaweed feed and soil conditioner
  • The best liquid seaweed feed and soil conditioner label
  • The best liquid seaweed feed and soil conditioner irish approved organic
  • The best liquid seaweed feed and soil conditioner in garden

Irish Organic Seaweed Soil Conditioner and Plant Tonic. 2.5 litre.


In a nutshell....

The Irish Organic Seaweed Soil Conditioner and Plant Tonic. 2.5 litre is from seaweed sustainably harvested off the west coast of Ireland from the North Atlantic Ocean.

Seaweed Fertiliser Is Mineral Rich & Conditions Your Soil

Organic seaweed fertiliser from Sea Nymph is ideal as a soil conditioner and plant tonic for organically grown fruit, vegetables and flowers. Provides extensive Trace elements. Conditions soil and stimulates plant growth.

This stuff is the business. Why? It is produced from seaweed sustainably harvested off the west coast of Ireland. Other seaweed feeds available on the market are produced from a powdered raw material. Our "Sea Nymph' liquid is produced from hand harvested Ascophyllum nodosum, a seaweed species exclusive to the North Atlantic Ocean. Harvesting by hand ensures quick plant recovery and causes minimal disruption to the natural habitat. It also produces a far more potent raw material which gives this product its extra punch.

The base extract is mixed with additional NPK and complexed minerals to tailor the range to specific needs throughout the year. Complexing of the minerals helps ensure they work for longer when applied as the complexing acts as a slow releasing agent giving longer performance to the minerals.

In short it's the best liquid seaweed you can get. Apply February to October.

Why use seaweed feed?

Seaweed contains the major plant nutrients but also a whole range of micro nutrients often absent in old and tired soil. Will also promote root growth and stimulate microbial soil life which makes more nutrients available to your plants. Seaweed fertiliser feeds will also strengthen the plants immune system helping to fight off bacterial and fungal attack.

The difference between our seaweed fertiliser feed and many others on the market is most other seaweed tonics use a powdered raw material which is diluted to produce the finished liquid. Our Soil Conditioner and Plant Tonic is made the old fashioned way, it's hand harvested in the unspoilt waters of the West coast of Ireland with the fresh seaweed going directly into the production process.

How is Sea Nymph made?

The sustainably harvested seaweed is first washed to remove any loose sand and shells. The seaweed is then places in stainless steel vats where the extraction process takes place. The idea is to break down the cell walls to release the broad range of nutrients unique to seaweed. Minerals, vitamins, amino acids and saccharides (sugar molecules) are first extracted and then cold filtered to remove any insoluble particles. The filtered end product is then bottled for use in your vegetable garden. In short it's the best liquid seaweed fertiliser soil tonic you can get. Apply February to October.

Contents: 2.5 Litres Concentrated, makes 45 litres or roughly 1/20 when mixing. As a guide a 5litre watering can will cover 2 x raised beds 6ft x 4ft.

Write a Review
May 29th, 2019
This is the best seaweed conditioner I have used. I use it on everything including tomatoes, fruit trees, cucumbers and everything else in my greenhouse, also raspberries and many other fruiting and ornamental plants. Of particular note is a tree the county council planted outside my house (Mountain Ash called Joseph Rock) The county council removed a large Sycamore tree whose roots were lifting up the pavement and cracking garden walls. The county council used a stump grinder and planted the mountain ash on top of the stump then covered the roots with some rock hard lumps of clay. The poor mountain ash had hardly any roots (Bare Rooted planting) I was present and witnessed the whole thing. It was also planted in March 2018 before one of the hottest and driest summers on record. This tree was doomed without my assistance. I watered the poor mountain ash several times a week and fed seaweed feed and also the tomato feed version of the seaweed feed available from Quickcrop as well. I als
Diana Meliciano
February 10th, 2018
Absolutely great aid for my plants. I use it every 2 weeks during the growing season, to keep them growing healthily. It is also easy to apply since it can go into any plant type.
October 27th, 2017
Excellent product with great results
March 31st, 2017
excellent fast service .quality product [seaweed ]
Lorcan O Keefe
May 31st, 2016
i used this and my soil seems a lot better than it used to be. good to see an irish company selling irish products.
Ellen Manning
April 09th, 2016
My soil and my vegetables both adore this Seaweed tonic. I have been using the 500ml size all summer and I still have some left so great value for money and wonderful for growning vegetables and fruit. I live in an urban area and have no choice but to grown a lot of my vegetables in containers but a weekly feed of this liquid seaweed tonic has really been a boost to the yield I am getting - my french beans in particular seem to produce a lot more and I used it instead of standard tomato food on my tomatoes this year and am still harvesting ripe tomatoes here in mid October in Ireland. I will order the larger size bottle when I eventually run out (It lasts forever). Thanks Quickcrop.
Ask a Question
Asked By Elizabeth
on May 20th, 2021
Can you let me know what is the best plant feed for hedges, preferably liquid form - beech and whitethorn. They are beteween 1-3 years old.
Answered by Niall
on May 20th, 2021
Hi Elizabeth This product will be good for hedging however the likes of Hedging is better with a slow release feed like our Seafeed rather than a liquid feed. A liquid feed will give the plants a quick boost but for hedging they need constant feed Niall Quickcrop
Asked By Katherine Fingleton AFBPsS
on March 02nd, 2021
Would this be helpful for garlic. Also how should I use it for growing garlic? Thank you for your help today.
Answered by Niall
on March 02nd, 2021
Hi Katherine Yes this is a very good feed for Garlic but later in the season as the bulbs start to expand in late April early May. Just mix with water 1/10 in your watering can and water on the plants Niall Quickcrop
Asked By Paul O'Shea
on January 05th, 2021
Hello, I am just inquiring would this tonic be se suitable for use on young native irish trees such as ash and hawthorn and cherry / apple blossoms? If not, can you please recommend a suitable product and what time of year it should be used? With Kind Regards, Paul
Answered by Niall
on January 06th, 2021
Hi Paul It would be fine however you would have to be constantly feeding the trees through the season with it. You would be best to use Seafeed which you spread on the soil 1ft to 3ft from the trunk of the tree. This will slow release in to the soil over the season and do a lot more for the trees Niall Quickcrop
Asked By Penny
on June 19th, 2020
Hi, can I use this as a folia spray?
Answered by Niall
on June 19th, 2020
Hi Penny Yes as it is 100% natural it is perfectly fine as a foliar spray Niall Quickcrop
Asked By Dominic
on April 17th, 2020
Hello, Is this suitable for lawns? I'm looking for an organic seaweed supplement for my lawn care regime. Is this more suitable than the organic seafeed?
Answered by Niall
on April 18th, 2020
Yes Dominic. For a lawn this is a much better feed and much easier to apply as it is in liquid form. This is what all of the golf courses have started to use instead of chemical feeds Niall Quickcrop
Asked By Eric
on February 10th, 2018
How much and how often would you use this on vegetables, mainly chillies? What is the npk?
Answered by Niall
on February 12th, 2018
Hi Eric. This product is more of a plant tonic for building up the micronutrients in the soil and the plants so as such it doesn't have any Nitrogen in it to feed the plants. It will give you very healthy plants but doesn't help them grow. If you want to feed your chillies or tomatoes you should use the red label Product we have which as added NPK in it and is an excellent feed.
Asked By miriam
on August 20th, 2017
Hi. What is the coverage rate for the 2.5ltr if used on a lawn - i.e what square area will the 450 litres of made solution give. Thanks
Answered by Andrew
on August 22nd, 2017
Hi Miriam. I would suggest applying 10 litres per 8 square meters therefore the 2.5L bottle will cover 360 square meters. I hope this helps. Andrew
Asked By Tom o shea
on April 03rd, 2017
How best can this be applied to grass? I have a large garden.
Answered by Andrew
on April 05th, 2017
Hi Tom. You can apply the liquid feed with a knapsack sprayer for a medium to large area.
Asked By Dan
on December 30th, 2016
Hello, I was hoping to buy some of this feed but was wondering if you could give me some more details about the NPK content; it's hard to track down the information on the web. many thanks
Answered by Andrew
on January 03rd, 2017
Hi Dan. Liquid seaweed is more of a plant tonic rather than a liquid fertilizer so N.P.K. isn't really applicable (it would be pretty low), this is why it is difficult to find info on it. The benefit of the seaweed is more in trace elements, amino acids and growth hormones. If you are growing tomatoes, for example we have a version with added NPK which is higher in potassium so it depends what you are using it for. I hope this helps! Andrew

Important Delivery & Stock Information 


Delivery Times

Delivery times had been impacted earlier in the year with the increase in online shopping putting immense strain on all couriers. Thankfully we are almost back to normal. 

Please allow 2-3 working days for delivery.

We sincerely apologise for any inconvenience which may have been caused due to Covid-19 and very much appreciate your patience during this time. 

Standard Quickcrop deliveries only €3.95.

Standard delivery €3.95 - Our standard delivery rate is €3.95 and covers all goods except raised beds and some selected heavy items. €3.95 is the total delivery price irrespective of the number of items ordered.

Allotment raised beds €5.95 - Allotment style raised beds carry a delivery of €5.95 per complete order. €5.95 is the total delivery price irrespective of the number of allotment raised beds or additional items ordered.

Premier/Deluxe raised beds €9.95 - Premier or Deluxe raised beds carry a delivery of €9.95 per complete order. €9.95 is the total delivery price irrespective of the number of raised beds or additional items ordered.

Bulky Items €9.95 - Some large items (e.g. compost bins) carry a delivery charge of €9.95. Any items that carry the large item surcharge will be clearly marked on the product page.

Will there be any extra charges? There are no customs fees. Occasionally an additional delivery charge may be incurred when preorder items are ordered along with items for immediate delivery. Preorder items include  bulbs, seed potatoes, garlic, onions, bare root stock etc. 

European deliveries outside Ireland
We also deliver to the UK and other European countries, please see our delivery rates below. Our flat delivery rate is an absolute bargain and is far cheaper than any of our competitors, please take this into account when comparing product prices.

Where do we deliver to?
We deliver nationwide to the island of Ireland, the U.K., Austria, Benelux Countries, Czech Republic, Denmark, Finland, France, Germany, Hungary, Italy, Norway, Poland, Portugal, Spain, Slovakia, Slovenia, Sweden and Switzerland. Please see our delivery rates below:

€12.95 - The United Kingdom (Highlands and Islands may incur a surcharge, please contact us at support@quickcrop.com for details)

€14.95 - Austria, Belgium, The Netherlands, Luxembourg, Denmark, France, Germany, Switzerland.

How long does it take?
Stock permitting we aim to dispatch your goods within 2 working days of receiving your order. The average time taken from order to delivery is 2-3 days for Irish orders, 3-5 days for UK orders, and 8-10 working days for other European destinations.

What If I'm not in at time of delivery?
The driver will leave a note with the depot contact number. Delivery can be arranged for the next day or a later date.

I'm ordering several items, do they all arrive at the same time?
All items dispatched at the same time will normally be delivered in one delivery. The exceptions are bulk bags of soil or compost which comes in a separate delivery using a different delivery company. Seedlings will be dispatched directly from our tunnels.

What if my parcel is damaged or I wish to return the goods I have ordered?
Contact our office at support@quickcrop.com and we will arrange collection and refund or replacement of faulty or damaged goods.

If you wish to return goods for any reason other than damaged or faulty items please return the item to us at the following address and we will issue a refund minus the delivery charge. Goods must be undamaged and in their original packaging. Please take care when parceling returned goods to ensure it reaches us in good condition.

Our returns address is: Quickcrop ltd., Unit 4, Ballymote Industrial Estate, Ballymote, Co.Sligo.


If you are unsure about any aspect of our delivery service, feel free to email us at support@quickcrop.com. Messages are monitored between 8am and 4pm Monday to Friday

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Irish Organic Seaweed Soil Conditioner and Plant Tonic. 2.5 litre.
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