Liquid seaweed biostimulant fertiliser supplier

Why should I apply seaweed to a lawn?

What is seaweed extract?

SmartLawn Seaweed Extract is made from a type of seaweed called Ascophyllum nodosum. Seaweeds have been used as fertiliser for many decades, they have been shown to benefit turfgrass in numerous ways time and time again. Our extract is made from seaweed harvested and processed here in the British Isles.

How does it work?

The natural habitat of Ascophyllum nodosum is a stressful place! It lives in the intertidal zone where it is constantly under stress from changing tides, temperatures and light levels. This seaweed has had to evolve ways of coping with the stress, it is these that we use to our advantage when applying it to turf!

Active ingredients in SmartLawn Seaweed Extract:

  • Macro and micronutrients
    • The product contains macro and micronutrients. Whilst not in high enough levels to replace fertiliser feeds, the micronutrients can help relieve stress and improve colour and vigour for a while.
  • Carbohydrates (e.g. Alginic acid, mannitol, laminarin)
    • These include simple sugars and complex starches. The large molecules cannot be used directly by the plant but they will feed beneficial microbes on the leaf surface and in the soil.
  • Natural growth promoters
    • Hormones including cytokinins, auxins and gibberellins all affect plant growth in some way. They are present in the seaweed in relatively high concentrations and it is thought that they do affect turf growth too.
  • Amino acids
    • Amino acids are the building blocks of proteins and are needed by plants to live. They are presents in seaweed in small amounts which can be of use to lawns. Seaweed is not an especially good source of amino acids, if it was we would eat a lot more of it!

What effects should I see?

  • Short-term effects
    • Increased growth of leaves or roots (depending on application method)
    • Improved colour
  • Long term effects
    • Lawn stays greener for longer in periods of drought
    • Lawn returns to normal state quicker after periods of high stress
    • Disease tolerance increased

How do I apply it?

SmartLawn Seaweed Extract should be applied with water, you can use a knapsack or a push-along sprayer. Seaweed extracts tend to tank mix well with most other products (except those containing ferrous sulphate), a small-scale jam-jar test should always be carried out prior to mixing.

Seaweed Can_editedWe recommend 200-400ml of Seaweed Extract per 100 square metres. The amount of water to use depends on the nozzle you plan to use, your walking speed and whether you are after a root or a foliar application. Generally, we advise 6-10 litres per 100 square metres.

You can use Seaweed Extract any time of year as long as it is not frosty, and there is no snow on the ground. For the best effect, you should aim for 3 or more applications per year but you will see benefits from using it on one-off occasions.

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