The Green Johanna is a top-performing food waste composter that turns food waste - including cooked food, meat, fish and dairy - and garden waste into quality compost within months.

Recommended as a Best Buy in Gardeners’ World magazine and in Which? magazine, the Green Johanna is an enclosed unit with a perforated base plate that allows access to worms and micro-organisms while deterring rodents.

Made in the UK from 100% recycled plastic, it has a five-year guarantee and expected lifespan of 10 years or more. 

  • Secure twistable lid helps to regulate ventilation.  
  • Patented airflow system enables air to circulate.
  • Two secure sliding hatches mean finished compost is easy to access but won’t leak out before you need it.
  • To maintain composting performance in cold weather and promote year-round hot composting temperatures the use of an Insulating Jacket is recommended. Green Johanna Insulating Jacket
  • One Johanna is designed to cope with the average food waste of a household of five and compostable waste from an average garden. 
  • In the first year it may take 6-8 months to get your first batch of compost. After that it should take 4-6 months. 
  • Aerating stick also supplied. Made from 100% recycled plastic (may differ from images on the website and elsewhere).
  • Self-assembly (the base plate and four modular sections screw together).
  • Modular sections mean that it’s possible to remove more compost by unscrewing and removing the top sections if you wish. Also, if one section becomes damaged that section can simply be replaced. 
  • Best placed on a flat patch of soil or grass.
  • If bones are added to the Johanna they will not be broken down so it would be necessary to remove stripped-down bones from the finished compost. For this reason we do not recommend that bones are added. 



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Made in the UK
Weight 10kg
Length 800mm
Width 800mm
Height 930mm
Colour Green
Material Plastic
Capacity (L) 330
Johanna Diagram Johanna Disassembled