Best Composters — 100L (2026)
1 composters matching capacity “100L”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Compost Bin UK (2026) guide.
#1 Pick
Wormcity Wormery 4 Composting Trays (100 Litre), UK Made- Recycled plastic
- Small gardens
- 100L
£110.00
Pros
- Includes worms, coir bedding and worm food to start immediately
- UK-manufactured from recycled plastic
- Produces liquid feed and rich vermicompost
Cons
- Needs more hands-on management than a static bin
Looking for a robust composting solution to tackle your garden waste? Our selection of 100L composters provides ample space for creating nutrient-rich soil from kitchen scraps and yard clippings. These containers are designed to efficiently break down organic matter, accelerating the composting process and reducing landfill contributions. A 100L capacity is ideal for smaller gardens or households generating a moderate amount of green waste – perfect for enriching flowerbeds and vegetable patches.
FAQ
What materials are these 100L composters typically made from?
Most 100L composters available on Amazon UK utilise durable, UV-resistant polyethylene (PE) plastic. This material is chosen for its longevity and ability to withstand outdoor conditions, including exposure to sunlight and rain.
How long does it usually take to fully compost in a 100L composter?
The composting time varies depending on factors such as temperature, moisture levels, and the materials added. Generally, with regular turning and proper management, you can expect a significant amount of compost within 6-8 weeks; however, some materials break down faster.
What type of waste can I add to a 100L composter?
You can add a wide range of organic waste, including fruit and vegetable peelings, coffee grounds, tea bags, eggshells, grass clippings, and small twigs. Avoid adding meat, dairy products, or oily foods as these can attract pests and disrupt the composting process.
Do I need to turn the compost regularly?
Regular turning – ideally once a week – is highly recommended for aeration and faster decomposition. Turning helps introduce oxygen to the pile, which encourages beneficial microbes and speeds up the breakdown of organic matter.
What’s the best way to maintain moisture levels in my 100L composter?
The compost pile should be consistently damp – like a wrung-out sponge. Add water if it feels dry, but avoid overwatering which can lead to anaerobic conditions and foul smells.
Are there any specific tools I need to manage my 100L composter?
While not strictly essential, a compost aerator tool or even a pitchfork can be incredibly helpful for turning the pile efficiently. A watering can is also useful for maintaining moisture levels.
Can I add garden waste like leaves and branches to a 100L composter?
Yes, you can certainly include fallen leaves and small twigs in your 100L composter. These materials require longer to break down, so they’re best mixed with ‘green’ waste for faster composting.
What size garden is a 100L composter suitable for?
A 100L composter is typically well-suited for smaller to medium-sized gardens or households that generate around 3-5kg of organic waste per week. It's a practical choice for those with limited outdoor space.
Are there any specific smells I should be aware of?
A healthy compost pile will have a slight earthy smell. However, unpleasant odours can indicate issues like anaerobic conditions – ensure you’re turning the pile regularly and maintaining proper moisture levels.
What are the typical dimensions of a 100L composter?
Dimensions vary slightly between models, but most 100L composters measure approximately 80cm (height) x 60cm (diameter). Always check the product specifications on Amazon UK for precise measurements before purchasing.