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(1 customer reviews)


Nutrient content (w/v)

Silicon                 5.2% (11% as silica)

Potassium          4% (as K2O)

+ dissolved seaweed biochemistry



Organic growers can finally utilise the powers of silicon nutrition thanks to Eutrema’s breakthrough technology. Sea-Silica is manufactured via a unique process that allows for seaweed bioactives to be co-extracted with silica content.

Until now organically grown crops have not been able to access silicon supplements. This was a major problem because silicon is needed for plant defence; silicon produces strong cell walls that resist pests, diseases, and environmental stress. With organic growers not using conventional pesticides, this meant that often crops could be completely wiped out by problems that could otherwise have been tolerated if silicon was available. Thus organic growers using Sea-Silica now have access to a new weapon in their Integrated Pest management (IPM).

Sea-Silica will break down into ‘mono-silicic acid’ when diluted into water. This will be absorbed by plant roots and moved to all tissues of the plant to form strong cell walls.

Note: NO silicon fertiliser contains monosilicic acid! However, all soluble silicon fertiliser break down to form monosilicic acid when diluted in water. Beware of companies claiming very high monosilicic acid contents; they are inferring ‘equivalent amounts’.

The seaweed bioactives in Sea-Silica, including alginic acid and sulphinated fucans, will further improve plant defence, by acting as elicitors of plant defence receptors. The mannitol from the seaweed will assist the plant in absorbing the key micronutrient boron, and also act as a natural antioxidant.

Furthermore, Sea-Silica can be used as an organic ‘pH Up’ to control the pH of your feed solution.


Application protocols

Root Drench; once the plants have established in the growing environment apply at 1.0 mL / litre during all phases of growth.

Foliar sprays; apply at 0.5 mL / litre of fresh water. Do not apply foliar sprays in hot conditions or in combination with any other product.

Cereal / field crops: Apply at 2-4 litres / hectare in 200-400L of water. For full details on how to use on salicylic acid to cereal crops download our FUNGICIDE REDUCTION ACTION PLAN


If you need to lower the pH in the tank or fertigation solution when using Sea-Silica, use our Organic pH Down product:

We cannot predict or guarantee tank mix success for any product; always conduct a bucket test to confirm compatibility.


Sea Silica is vegan-friendly.

1 review for Sea-Silica

  1. Matt

    Plants stood erect after use.

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