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Green Johanna 330 Litre Hot Bin Composter

Regular price
  • Rapid decomposition: Hot composters break down organic materials quickly, producing compost in a matter of weeks.
  • Weed seed and pathogen destruction: High temperatures kill weed seeds, pathogens, and harmful bacteria, resulting in sanitized compost.
  • Versatile composting: Hot composters can handle a wide range of materials, including meat, dairy, and diseased plant matter.
  • Efficient use of space: Compact design and quick composting process make hot composters ideal for small spaces or urban environments.
  • Reduced odors and pests: Properly managed hot composting minimizes odors and deters pests, creating a cleaner composting experience.

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Earn up to: 795 Green Points

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

Designed in Sweden and made in the UK from 100% recycled plastic, it has an expected lifespan of 10 years or more. 

The Johanna’s patented airflow and ventilation systems create optimum conditions for a busy eco-system of composting micro-organisms to digest waste, releasing energy as they do – hence the term hot composter.

One Johanna hot composting bin is designed to cope with the average food waste of a household of five and compostable waste from an average garden.
A free aerator stick comes provided.

Design features

The Johanna hot bin composter is made up of easily-assembled sections that form an enclosed unit with an integrated base plate that allows easy access to composting micro-organisms while deterring rodents. It should be placed in a shady area on soil, grass or gravel.

The secure, twistable lid regulates the ventilation system to adjust air circulation. In cold weather, twisting the lid to the maximum locked position helps to maintain the ideal temperature inside.  The efficient airflow system helps to maintain an aerobic environment, which, together with effective layering and aerating, prevents odours.

Two secure, good-sized sliding hatches at opposite sides of the unit mean that your finished compost is easy to access but won’t leak out before you need it.

 The Johanna has been designed robust enough to withstand Swedish winters and enable year-round composting. A Winter Jacket is available separately to provide insulation in cold weather.

Depending on conditions, your fresh organic compost should be ready to use after 4-6 months. 

Also Recommended: our bundle with a 12.5kg bag of Complete Rot for Grass -  a composting solution designed to facilitate the easy decomposition of grass clippings. Crafted from restructured organic waste material, this product harnesses the power of natural enzymes and abundant free carbon. Its purpose is to counterbalance the excessive nitrogen levels that typically hinder the composting process of grass clippings.

Hot Bin Composting.

The Johanna is fully guaranteed for five years.


Weight: 10kg

Dimensions: L - 800mm x W - 800mm x H - 930mm

Download our user manual

This product is shipped directly from our supplier so next-day delivery is not available on this product and any products you order at the same time. Items sent from us will be sent to arrive in 3-5 working days and your composter will arrive in 5 days.

Shipping Information

Our standard delivery charge is £3.95

(Next Day delivery is £5.95)

*GB mainland only and other exclusions apply. Please see below for full details.

AreaStandard DeliveryRoyal Mail (Live Orders)Next Working Day Delivery
Mainland UK (excludes highlands)£3.95£3.95£5.95
Falkirk, Aberdeen Perth Kirkwall Paisley and Inverness Areas (not islands), Isle of Man and Isle of Wight£14.95£3.95N/A
For Scottish Islands, Outer Hebrides, Kilmarnock area, Paisley area, Chanel Islands and Northern Ireland£19.95£3.95N/A

All our orders are now despatched from our farm here in Herefordshire and so we’ve made a few changes. We will always despatch orders as soon as possible, but we do offer a next day delivery service (some restrictions apply) for those urgent orders.

Wiggly Standard Delivery (3 - 5 day delivery) £3.95 within mainland Britain

If you don't mind when your order arrives... (within reason of course) Choose standard delivery and we will despatch your order with the best option for us. This may be APC Overnight, DPD or Royal Mail. You need to allow 2 - 5 days for delivery, and we can post to anywhere in mainland Britain. See below if you are in Highlands and Islands.

Next Week Day delivery for £5.95 to mainland Britain

If you need a guaranteed Next Day delivery then please choose the Next Day delivery option. If you order on a Friday then the delivery will be with you on the following Monday. Please note there are no deliveries on Saturdays, Sundays or Bank Holidays. You must order before 1pm for your order to be sent to arrive the following working day. If you order after 1pm then your order will be shipped on the next working day.

Important - Highlands and Islands

IF your order contains JUST live worms and is under 2 kilos - whether that’s composting worms, wax worms or mealworms you will have the option in the checkout to choose standard delivery at £3.95. This is because we can use Royal Mail for this service. Otherwise you will see the extra cost options for a courier to deliver your package – please note there is no guaranteed next day service to these areas so please allow extra time and track your package for information. 


For Falkirk, Aberdeen Perth Kirkwall Paisley and Inverness Areas (not islands), Isle of Man and Isle of Wight the charge is £14.95


AB37-38 AB41-56 FK 17-21 IV1- 40 IV52-54 IV63 KW1-14 PA21-40 PA80 PH15-50 IM1-9 IM86-87 IM99 PO30-41) 


For Scottish Islands, Outer Hebrides, Kilmarnock area, Paisley area, Chanel Islands and Northern Ireland the charge is £19.95


HS1-9 IV41-56 KA27-28 KW15-17 PA20 PA41-78 PH42-44 ZE1-3 BT1-99 JE1-5 GY1-10) 




Damaged or Faulty Goods
In the unlikely event that you receive an item that is damaged or faulty, we can offer a full refund within 60 days of the customer receiving the order. We simply require photographic evidence of the damaged/faulty item with tracking number within 7 days.

To return a damaged or faulty item is free of charge, please contact with your name, address & order number and our customer service team will advise on the easiest way to send.

Once the item has been received and inspected by our customer care team, you will be notified that a refund has been issued and feel free to order the item again from our website.

In the case of LIVE WORMS these can’t be returned so in the unlikely event that they have arrived damaged please take a photo on the same day and send that photo straight away to our team with a description of what the problem is and ensure you include your name, address and order number.

Once the photograph and description has been looked over by our customer care team they will get back to you to advise or issue a replacement or refund.


Returning an Order
Sometimes it just doesn’t work out. We get that. If you’ve changed your mind and want to cancel your order, we ask that you contact our sales team and return the item in its original packaging within 60 days to:
Wiggly Wigglers Lower Blakemere Farm, Blakemere, Herefordshire HR2 9PX

Unfortunately, we aren’t able to cover the cost of returning unwanted items, so the postage cost of returning these items is the responsibility of the customer. Please ensure that you obtain proof of posting as items being returned are the responsibility of the customer until the items reach our farm.

Once the item has been received and inspected by our customer care team, you will be notified that your refund has been issued. Please note the item must be returned with the original packaging, as new, unused, and free of defects.

Of course if you cancel your order before the items are shipped out a refund will be issued right away.


Please email us at if you need any further information.

FAQs for Hot Composting


1. What is hot composting? Hot composting is a method of composting organic materials that relies on microbial activity to break down the materials quickly, generating high temperatures in the process.


2. How does hot composting work? Hot composting works by creating the ideal conditions for microbes to rapidly decompose organic matter. This includes providing a balanced mix of green (nitrogen-rich) and brown (carbon-rich) materials, adequate moisture, and aeration. As the microbes break down the materials, they generate heat, raising the internal temperature of the compost pile.


3. What are the benefits of hot composting? Hot composting offers several benefits:

  • It produces compost quickly, usually within a few weeks to a few months.

  • High temperatures in the compost pile kill weed seeds, pathogens, and harmful bacteria, resulting in a sanitized compost.

  • Hot composting helps break down tough materials like meat, dairy, and diseased plant matter that may not decompose effectively in cold composting methods.

4. What materials can be composted in a hot composting system? You can compost a wide range of organic materials, including:

Green materials: Fruit and vegetable scraps, grass clippings, coffee grounds, and fresh garden waste.

Brown materials: Dry leaves, straw, cardboard, paper, and woody materials.


5. What materials should be avoided in hot composting? Avoid composting materials such as meat, bones, dairy products, and oils, as they can attract pests and create unpleasant odors. Additionally, avoid composting materials treated with pesticides or chemicals.


6. How do I start a hot compost pile? To start a hot compost pile, layer green and brown materials in a 2:1 ratio (carbon to nitrogen) in a pile or compost bin. Keep the pile moist but not waterlogged, and turn it regularly to aerate the compost and maintain high temperatures.


7. How hot should a compost pile get? Ideally, a hot compost pile should reach temperatures between 54°C to 71°C. Temperatures in this range promote rapid decomposition and help kill pathogens and weed seeds.


8. How often should I turn a hot compost pile? Turn the compost pile every few days to a week to aerate the materials and distribute heat evenly. As the pile matures and temperatures decrease, you can reduce the frequency of turning to once every couple of weeks.


9. How long does it take for hot composting to produce usable compost? Hot composting can produce finished compost in as little as a few weeks to a few months, depending on factors such as pile size, materials used, and environmental conditions.


10. How do I know when the compost is ready? Finished compost will have a dark, crumbly texture and an earthy smell. It should no longer resemble the original materials used in the pile. You can also use a compost thermometer to ensure that the temperature has stabilised, indicating that the composting process is complete.


Remember, hot composting is a dynamic process influenced by various factors, so don't hesitate to experiment and adjust your methods as needed to achieve the best results.

The Wiggly Story: Bringing Your Garden to Life.

Nestled in the heart of rural Herefordshire, within The Duchy of Cornwall estate lies Lower Blakemere Farm – the cherished home of Wiggly Wigglers and founder, Heather Gorringe. From its humble beginnings on Heather’s kitchen table over 30 years ago, our small but dedicated team is working hard on a legacy of sustainability and regeneration. Our farm isn’t merely a plot of land; it’s a dynamic hub where we’re aiming to balance food production with biodiversity and since we started our regenerative journey there’s a real focus on improving soil health and sustainability. Beyond our own endeavours, we’re passionate about sharing best practices and developing products designed to Bring your Garden to life.

The Wiggly Promise

At Wiggly Wigglers, it’s not just about sales (though we appreciate your orders and support for the farm!).

We’re here to offer a range of sustainable solutions that add fun to composting, boost biodiversity, and make bring your home and garden to live, whilst making the world just a little bit greener.

  • Trusted: We’ve been here for over 30 years, with over 100,000 orders shipped.
  • Try our products: We have a risk free 60 Day No Quibble Returns policy.
  • Great Value: Buy Direct - we grow, mix, pack and ship direct from our farm in Herefordshire.