Best Composters — 65L + Plastic (2026)
1 composters matching capacity “65L” + material “Plastic”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Compost Bin UK (2026) guide.
#1 Pick
Outsunny 65L Compost Bin, 360° Tumbling Composter with Steel Base- Plastic
- Garden Waste
- 65L
£39.99
Pros
- Compact 65L size suits smaller gardens
- 24 ventilation openings promote aerobic composting
- Single door keeps loading simple
Cons
- Smaller capacity means more frequent emptying
These 65L plastic composters are a robust and convenient solution for home gardeners looking to create their own nutrient-rich soil amendment. Constructed from durable, high-quality polyethylene plastic, these bins are built to withstand the rigors of outdoor use, providing years of reliable composting performance. The generous 65-litre capacity is ideal for larger gardens or households generating significant amounts of organic waste – perfect for tackling grass cuttings, vegetable peelings and garden clippings.
The dark colour of the plastic helps retain heat, accelerating the decomposition process, particularly during cooler months. These composters are designed with a practical, easy-to-use design featuring an air ventilation system to promote healthy microbial activity. Remember to check the manufacturer’s guidance for optimal layering techniques and moisture levels within your composter to achieve the best results.
FAQ
What size garden is this 65L composter suitable for?
This 65L composter is well-suited for gardens up to approximately 100 square metres, or households that regularly produce a substantial amount of green waste like grass clippings and vegetable peelings. Larger gardens might benefit from multiple composters.
What type of plastic are the composters made from?
They're constructed primarily from high-density polyethylene (HDPE) plastic, known for its durability and resistance to UV degradation. This material is chosen for its ability to withstand prolonged outdoor exposure without significant cracking or fading.
Do I need a specific type of soil to add to my composter?
While not strictly required, adding a thin layer of garden soil at the base of your composter can introduce beneficial microorganisms and improve aeration. This helps speed up decomposition and creates a more balanced environment for the composting process.
How often should I turn my compost?
Regular turning is crucial for effective composting. Aim to turn your composter every 3-7 days, especially during warmer months, to provide oxygen and maintain an even temperature. This prevents anaerobic conditions which can cause unpleasant smells.
What materials can I compost in this bin?
You can compost a wide range of organic materials including grass cuttings, vegetable peelings, fruit scraps, tea bags (remove staples), coffee grounds, shredded paper and cardboard – just avoid adding meat, dairy or oily foods.
Will the plastic fade over time with sunlight exposure?
HDPE plastic is designed to resist UV degradation, but prolonged exposure to intense sunlight can still cause some fading. Regular cleaning and occasional replacement are recommended for optimal appearance and longevity.
How do I clean the 65L composter after use?
Clean your composter with warm soapy water and a brush or sponge. Avoid using harsh chemicals, which could damage the plastic. Ensure it's completely dry before storing to prevent mould growth.
What’s the best way to ensure good airflow within the composter?
The built-in ventilation holes are designed for airflow, but layering your compost with coarser and finer materials helps maintain this. Avoid compacting the material too tightly to allow air circulation.
Is it possible to add water to my composter?
While a slightly damp environment is ideal for composting, avoid overwatering. The moisture should come primarily from the organic matter you're adding. Monitor regularly and adjust accordingly – too much water can lead to anaerobic conditions.
What if I’m having problems with smells coming from my composter?
A foul odour usually indicates anaerobic conditions, meaning there isn’t enough oxygen. Turn the compost more frequently, add bulky materials like straw or shredded cardboard to improve aeration, and ensure you're not adding prohibited items like meat or dairy.