Plagron Nutrients - Silic Rock


Size: 500ml
Sale price£14.99

Plagron Silic Rock - Toughens Up Plant Structures

Silicon has an all-round strengthening effect on plants, which is why it has been a go-to additive for years, and a favourite among commercial growers. It works by fortifying cell walls, which thickens up stems and causes branches to toughen. It's not uncommon to see silicon-treated stems that are twice the size of their untreated counterparts! With bigger, better, more robust structures, plants can uptake and transport more nutrients, making them more resistant to stress. For this reason, plants treated with silicon are less vulnerable to pests and diseases, making Silic Rock an absolute must.


Choose from 250ml, 500ml and 1 litre sizes using the dropdown menu. 


  • A highly bio-available silica supplement
  • Promotes robust plant structures - delivers thicker stems and stronger branches
  • Increases overall growth rates
  • Heightens plants' resistance to stress, including environmental issues, pests and diseases
  • Increases the thickness of individual cell walls
  • Promotes plant hydration by reducing water loss
  • Used at no more than 1ml per litre

How To Use

Give the bottle a good shake before use.

Silic Rock should be used at a rate of no more than 1ml per litre (1:1000). You can add it with every feed, right the way through the grow and bloom phases.

Attention: This nutrient is not suitable for hydroponic growing systems.

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