Irish makers · Our recommendation

Donegal Seaweed: Irish liquid seaweed plant feed

Donegal Seaweed is a family-run business in Dungloe, Co. Donegal, making liquid seaweed fertiliser from hand-harvested Atlantic Ascophyllum nodosum. We think it's worth knowing about if you grow in pots. We don't sell it, so you buy direct from them.

Visit Donegal SeaweedContact them
Made in Co. DonegalUpdated October 2026
Please note

PlantGift does not sell or ship Donegal Seaweed products and has no formal partnership with the company. Prices, delivery, safety information and certification come from Donegal Seaweed, so please check them with the maker before you buy.

The range

Three products for three kinds of growing

Donegal Seaweed's range, as described on its own website. Pack sizes and prices are on their shop.

Garden Force

Liquid seaweed fertiliser for domestic gardens, the one most relevant to home growers, containers and pots.

See it on donegalseaweed.com →

AscoBoost

Made for amenity use such as golf courses and sports fields. Most home gardeners won't need it.

See it on donegalseaweed.com →

SeaHydra

Made for commercial crops, for growers rather than home gardeners.

See it on donegalseaweed.com →

Bulk and trade buyers can see their bulk orders page.

The maker

A small Irish business on the Atlantic coast

Donegal Seaweed describes itself as family-run, harvesting brown seaweed by hand from Donegal's Atlantic shoreline and turning it into liquid fertiliser.

  • Where: Meenmore, Dungloe, Co. Donegal
  • Seaweed: Ascophyllum nodosum, a brown seaweed
  • Sold: direct through their own online shop
  • Read more: their story and their agronomy page

Using liquid seaweed with your plants

Liquid seaweed is a plant feed that gardeners use on pots and borders. Whatever product you choose:

  • Follow the dilution and frequency on the label exactly
  • Water plants first rather than feeding dry compost
  • Don't feed plants that are dormant in winter unless the label says to
  • Keep it out of reach of children and pets
Growing in pots?

Guides from PlantGift

Harvest Hub

Grow fruit and herbs at home in Ireland, with a month-by-month calendar.

Open the hub →

Easy-care plants

Plants that forgive a missed watering.

See easy-care plants →

Plant care guides

Watering, light and feeding guides for the plants we sell.

Browse the guides →
FAQ

Donegal Seaweed: your questions answered

Does PlantGift sell Donegal Seaweed products?
No. PlantGift does not sell, stock or ship Donegal Seaweed products, and we have no formal partnership with the company. This page is a recommendation only. Prices, delivery and orders are handled directly by Donegal Seaweed through their online shop.
What does Donegal Seaweed make?
Donegal Seaweed, based in Dungloe, Co. Donegal, makes liquid seaweed fertilisers from Ascophyllum nodosum, a brown seaweed harvested from the Atlantic coast. Its range has three products: Garden Force for domestic gardens, AscoBoost for turf and amenity grass, and SeaHydra for commercial crops.
Is Donegal Seaweed organic?
Donegal Seaweed describes its fertilisers as organic. We have not seen a certificate, so we can't confirm a specific certification. If organic status matters to you, check the product label or ask the company through their contact page before you buy.
Is liquid seaweed safe for pets, children and edible plants?
We can't give safety advice for a product we don't sell. Read the label and the manufacturer's safety information, follow the dilution instructions exactly, and ask Donegal Seaweed directly if you have questions about pets, children or edible crops.
How do I use a liquid seaweed feed on potted plants?
Dilute it exactly as the product label says, and apply it to damp compost or as the label directs, rather than to dry, stressed plants. Check the label for how often to feed, and never use a stronger mix than recommended. Our guides to growing fruit and herbs in pots and caring for easy-care plants cover watering and light.
Where can I buy Garden Force?
Buy it directly from Donegal Seaweed at donegalseaweed.com. Some Irish garden retailers also stock it, so check with your local garden centre.

Buy direct from Donegal Seaweed

PlantGift does not sell this product. Orders, prices and delivery are with the maker.

Go to their shopContact them