British Organic Bio Sea Silica 1 Litre

Organic, soluble silica source

Organic growers can finally utilize the powers of silicon in their grow thanks to B.O.B. unique breakthrough in organic nutrient technology. Sea-Silica is produced 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.

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.


Apply 1ml per litre of water during the flowering or fruiting phase.

Sea Silica can also be applied as a foliar spray at 0.5ml per litre, once a week during the vegetative phase.
Spray your plants just before sunset or lights off to avoid burning. 


Microbial activity(beneficial bacteria and funghi) is a key part of organic gardening, to avoid harming the soil life we avoid using fresh tap water due to the presence of chlorine. We can use filtered water, leave tap water to stand for 24 hours or a simple solution is to apply Ecothrive Neutralise to instantly dechlorinate tap water.


  • Produced in the UK
  • Organic, soluble silica source
  • Helps to resist pests and diseases
  • Strenghtens cell walls
  • Can be uesd as a foliar spray
Weight N/A

1 Litre



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