Block Clean keeps your growing media clean and free from unwanted biomass throughout your plants cycle. Biomass can become a breeding ground for disease pathogens and should be treated as soon as it is seen. Block Clean Spray can be used on any growing media that attracts biomass (green sludge) and there is no need to remove your plants from the growing media before using this product, just shake well and point to the infected areas and spray. If the biomass is quite severe it may take a couple of treatments with Block Clean to remove it all. Block Clean is not recommended to use on seedlings or cuttings.

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Shipping & Delivery

Shipping & Delivery

All our products are delivered in unmarked packaging.

Express parcel delivery service

All our products are shipped via DPD with email notifications 1 hour before delivery.  Prices are

  • Under 2KG - £3.99
  • Over 2KG - £7.99 
  • Free shipping on all orders over £250

Some postcodes within the UK, including but not limited to the Scottish Highlands and Northern Ireland will incur a delivery surcharge, for details please contact us PRIOR to placing an order.