Seaweed has been used as a soil improver for hundreds of years, especially in areas near the coast.
There are many useful plant nutrients contained in seaweed including magnesium, nitrogen, phosphate and potassium. Seaweed is a common additive to organic and non organic fertilisers. Both dried and liquidised types of seaweed are available. See our complete range by clicking here
Any gardeners that want to avoid synthetic fertilisers or fertilisers made from animal products will find seaweed products very useful. Usually seaweed and seaweed fertilisers are a renewable and sustainable resource.
Plants only need small amounts of certain nutrients such as Growmore and fish, blood and bone, and seaweed is rich in trace elements of these. Often common fertilisers are lacking in these and they are still important for the health of plants.
The plant nutrient content in fresh or dried and processed seaweed products is not guaranteed or standardised so they are not true fertilisers. There are however lots of fertiliser products that do contain additional seaweed extracts.
If you live in a coastal area and plan to collect seaweed from the beach be aware there is no public right to do this unless you own the beach and it is not an area of conservation. We advise that you check with the local council first.
If using fresh seaweed then it should be used like any soil conditioner and dug in one or two spades deep below the surface. If using on a compost heap fresh seaweed should be mixed with woody or fibrous material such as paper or prunings.